cruise control stopped working on car

5 Reasons Why Your Cruise Control Stopped Working

• Updated: March 15, 2023

It would be difficult to find a vehicle on the road today without cruise control. This invaluable feature makes driving long distances easier but can also cause trouble when it malfunctions. Understanding the reasons your cruise control stopped working ensures that you can get the problem fixed quickly for a more enjoyable ride. 

While this fault can cause issues with the cruise control system itself, there could also be an effect on the acceleration of your vehicle. That’s why you want to have it looked at as soon as you notice a problem. Let’s take a quick look at the reasons your cruise control may have stopped working.

Reasons Why Your Cruise Control Stopped Working

The most common reason a cruise control stops working is due to a blown fuse or a defective brake pedal switch . It can also be caused by issues with the throttle control system or the ABS. In older cruise control systems, it can be caused by a broken vacuum line.

Here is a more detailed list of the possible reasons your cruise control is not working:

1. Blown Fuse

All electrical systems in the vehicle are controlled by fuses. Your cruise control system is attached to a fuse that can blow if there is a short circuit or fault. Without a good fuse, the cruise control system can’t work at all.

Thankfully, it’s not difficult to find and replace a blown fuse. Look in the owner’s manual to find the fuse that corresponds with the cruise control technology. 

2. Defective Brake Pedal Switch

The brake pedal switch is responsible for turning the brake lights on and off based on the pedal position. Cruise control systems are designed to disengage whenever your brake pedal gets pressed. 

Because the cruise control is wired into the brake pedal switch, any fault can cause it to stop working. When the brake pedal switch malfunctions, the car believes the brakes are engaged, causing the system to turn off automatically. Not only that, but your car’s brake light might also be stuck on, leaving confused drivers in your wake. 

3. Malfunctioning Speed Sensor

Speed sensors are located on every wheel or differential. The purpose of these sensors is to monitor the speed of the wheels to determine if traction control is needed. 

The speed sensors are also part of the cruise control system. When a sensor fails, the cruise control can stop working and the speedometer might act strange as well. 

If there is an issue with a speed sensor, it will often show with an ABS warning light or a check engine light on the dashboard.

RELATED: 3 Symptoms of a Bad ABS Wheel Speed Sensor

4. Electrical Issues

The cruise control system is electronic, with many components working together to make the system operate. If the cruise control fails to work, you want to check the wiring harness and associated connectors for a fault.

You also need to ensure that the voltage source is supplying enough power to the system. Even the smallest fault can cause defects with the cruise control. In many cases, there can be an issue with the cruise control lever or buttons causing the cruise control to not engage.

If your cruise control buttons are located on the steering wheel it could also be caused by a bad clock spring, which is located behind the steering wheel.

Check the system with an OBD2 scanner to look for any trouble codes related to the cruise control.

RELATED: 5 Symptoms of a Broken Clock Spring, Location & Replacement Cost

5. Damaged Vacuum Actuator, Hoses or Cable (Older cruise control)

If you drive an older vehicle with cruise control, you might have an issue with the vacuum actuator or the cable that connects to the throttle. If there has been damage done to the vacuum hoses or the actuator, the cruise control will stop working altogether.

Additionally, the cable linking the actuator to the throttle must be in good shape. If it has been broken, the cruise control will fail. 

What is Cruise Control?

Cruise control is a feature that is used when you are traveling at a consistent speed. Cruise control was first introduced for automobiles in the 1950s. However, it took many years before it became a staple in the modern vehicle.

This electrical system allows you to set a predetermined speed and take your foot off of the gas pedal. If you are on a long drive, there is less fatigue because you don’t have to try to maintain your speed. Cruise control can also benefit fuel economy because the vehicle uses less fuel when traveling steadily. 

In newer cars, you might be able to find adaptive cruise control , which is a smart technology. Adaptive cruise control allows you to travel at a predetermined speed, but it also helps to maintain a safe distance from the vehicles in front of you with the help of sensors. With conventional cruise control, you need to take over when the car in front of you slows down, but that’s not the case with adaptive cruise control. 

There are also vehicles nowadays with not only cruise control, but fully self-driving vehicles . We will most likely see much more of this in the future.

Cruise Control Repair Cost

The cost to repair your cruise control system depends on what caused it to fail. If you need to replace a cruise control or brake switch, you might spend between $125 and $350, including parts and labor. However, the cost to change a fuse is only a few dollars and you can perform the replacement yourself in just a matter of seconds. 

On the other hand, when something major fails, such as the actuator, you could be looking at a much higher repair bill. In some vehicles, the cost to replace a cruise control actuator can cost more than $700. These costs rise if you drive a luxury vehicle or one that is difficult to get parts for. 

It might not seem immediately important for you to fix the broken cruise control, but this defective system can affect other performance aspects. You could start to notice issues with acceleration or have trouble with the speedometer. To play it safe, it’s always best to have the cruise control repaired as soon as you notice a problem.

Is there a fuse for the cruise control?

Yes. If the cruise control is installed from the factory, you should check your car’s owner’s manual for the fuse location. If it’s an aftermarket cruise control, you’ll need to follow the wires to find the fuse.

Does the brake switch affect the cruise control system?

Yes. The brake switch affects the cruise control system. The brake switch sends a signal to the cruise control system to let it know when the brakes are being applied for the engine to know when it should stop accelerating.

Will the cruise control work if the check engine light is on?

The cruise control function will be disabled when the check engine light is on in most car models, even if the cause of the check engine light is not the cruise control itself. This is mainly due to safety reasons.

Can a vacuum leak affect cruise control?

Older vehicles use vacuum to control the throttle for the cruise control, and in this case a vacuum leak can heavily affect the cruise control. However, modern cruise controls are fully electric and in most cases will not be affected by a vacuum leak if the check engine light is not illuminated.

Although many people may think that the cruise control system is unimportant and not worth spending money to repair, the problem can be caused by a faulty part that will affect the engine’s performance or durability. Therefore, it is best not to ignore the problem if your cruise control is not working without first diagnosing the car properly.

If your cruise control still isn’t working after trying all the tips in this article, it’s probably time to take it in for a professional opinion from a mechanic. It may be a more serious problem that requires replacement parts or repairs. In the meantime, drive safe and enjoy the open road!

Learn more:

• Brake Lights Not Working But Tail Lights Are? (How to Fix)
• Tail Lights Not Working But Brake Lights Are? (How to Fix)
• Brake Lights Stay On? (5 Causes & How to Fix it)

Categories: Electric , Troubleshooting

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• Why is my Cruise Control not Working? [14 reasons]

14 Reasons Why your Cruise Control may NOT Be Working

The reason for your cruise control not working could be as simple as a blown fuse to really complex electrical problems. Defective switches, sensors, and even “check engine” light, all could contribute to this problem.

If you like to travel and own a car fitted with cruise control, you know how comfortable it can be to maintain a constant speed! When a cruise control system gets damaged, it is just as annoying as it is dangerous.

Cruise control is connected to several components of the car, and when it fails it can mean that something could be wrong with the CC itself. It could also be a signal that something wrong is happening with any other component of the car.

Why is my cruise control not working?

In this article, I am going to show you the main reasons why your cruise control may not be working (from the simplest to the more complex ones):

Reason #1. Bad or blown fuse

The cruise control’s circuit (like many other electronic components of your car), is protected by a fuse that will blow to protect the system from short circuits and overloads. If your vehicle’s cruise control fuse is blown, the system will stop working.

You can replace the fuse with a new one of the correct amperage, according to your vehicle’s owner manual. If the new fuse doesn’t blow again, everything will be ok; if the fuse blows again, you have to keep searching for what is making that fuse blow.

Reason #2. Burnt brake lamp

Some cruise control systems are disabled when the brake lamp is blown. Check your brake lights. If you find a burnt brake light, just replace it and test the system again.

Reason #3. Defective brake light switch

A defective pedal switch can also make your cruise control stop working. Remember that all cruise control systems are automatically disengaged as soon as the brake pedal is pressed down.

If the cruise control didn’t stop working when a fault in the brake light or brake pedal switch is detected, it could be dangerous; that’s why the CC control unit constantly monitors the status of this switch.

Reason #4. Clutch pedal switch deactivation (for manual transmission vehicles)

Cruise control is deactivated when the clutch is pressed by the driver in manual transmission cars. The CC control unit monitors this switch as it does the brake light switch.

Reason #5. The vehicle speed sensor is not working

A vehicle’s cruise control needs to be able to determine the vehicle’s actual speed. This enables the system to determine how much throttle needs to be applied in order to keep a certain speed, among other things.

The speedometer speed sensor is not always the sensor used by cruise control. Some systems rely on the ABS speed sensors, others do an average and some have a dedicated speed sensor.

If the system can’t detect the vehicle’s speed or detects a problem with the speed sensor, it will stop working.

Reason #6. Faulty throttle body or accelerator pedal

In modern engines, the throttle body is driven electronically by the engine control unit (ECU), and the accelerator pedal works like a potentiometer. The processor managing the cruise control system will act as the accelerator pedal, sending more or less voltage to the throttle body to open or close the throttle body’s butterfly valve.

If there is a problem with your vehicle’s throttle body, your cruise control won’t work.

Reason #7. Check Engine light is “ON”

If your vehicle instrument panel has the “Check Engine Light” ON and the fault stored in the ECU’s memory is related to some component vital for the cruise control system, you will not be able to use your cruise control until you have fixed that problem.

Reason #8. Faulty steering wheel’s spiral cable/clock spring

The spiral cable connects all the switches from the steering wheel (in case your steering wheel has switches) to their respective modules. This includes the connection of the driver’s airbag.

These wires (also called clock springs) are prone to get cut. A faulty spiral cable may have an open circuit making it unable to reach the vehicle’s cruise control module (CCM).

Reason #9. Bad Cruise Control Switch

Your vehicle’s cruise control switches have internal contacts that wear out. If that happens, the switches won’t be able to contact the CCM.

Depending on which buttons are faulty, your whole cruise control can stop working or just some functions won’t work.

Reason #10. Electrical problems with different modules and wiring

Modern cruise control systems use electrical and electronic components, and they are connected to other modules and systems of the vehicle. Some of these systems are the ECU, ABS, and/or Stability Control Systems like ESP.

The CCM makes a check of these systems once the key is switched to ON, and if some of these components are not working in optimal conditions, the CCM won’t engage. If none of the above items seem to be the problem, the vehicle needs to be taken to a professional who can perform a full scan of all the components, check that all the voltages, wiring harnesses, and connectors are ok.

The professional is going to detect if there are any connection problems between modules and will be able to find the reason why the cruise control is not working.

Reason #11. Dirty or faulty camera or sensor (only for vehicles fitted with adaptive cruise controls)

Newer vehicles have adaptive cruise control systems. These devices not only keep a fixed speed by the driver; they also can detect other vehicles ahead and behind and are able to keep a safe fixed distance to avoid collisions.

Some of these new systems have laser sensors while others have cameras to calculate the right distance to follow considering the vehicle’s speed and acceleration. Any problem with the sensors will prevent adaptive cruise control from working.

Problems with older cruise control systems

Before electronic injection and electronic throttle bodies, some cars had the cruise control function. In fact, the first cruise controls were introduced in the early 1950s.

These electromechanical cruise controls are pretty simple. They have a vacuum actuator connected to the throttle linkage that opens and closes the throttle to maintain the vehicle’s speed.

In early injection cars, the throttle linkage was replaced by a cable. Some common faults of these old cruise control systems are:

• A faulty vacuum actuator. Vacuum actuators have a diaphragm inside that can break. Any vacuum leak will lead to failure.
• Faulty vacuum control solenoid. It can prevent the actuator from operating normally.
• Broken throttle cable. If the throttle cable or linkage is broken, it needs to be replaced.

I hope you enjoyed my guide to cruise control problems. Even though it doesn’t explain how to fix your cruise control, it gives you an idea of where to start looking if you are going to do it yourself.

Now you will have an idea about how the system works and what are the possible reasons why it’s failing (in case you have to take your vehicle to a shop to be repaired).

Attention! This article is for informational purposes ONLY and is NOT a replacement for professional advice! ALWAYS consult your local specialist for an appropriate solution to your problem. All statements, prices, contact information, recommendations, and reviews contained herein came from sources that we believe to be reliable, but the accuracy or completeness thereof is not guaranteed. Please contact the service provider for complete details and updates.

I always Know and admit that even though I went to school for ABR grad. In 1994 3.36gpa still have go go back to school for upgrades due to vehicle advancement but I still learned alot although I am dealing with an 05 f150 stx which has more recalls then a auto parts store where the employees don’t know a inerta. Switch from an ignition switch ,thanks for the information

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Cruise Control not Working (Diagnosis and Troubleshooting)

What makes cruise control not work.

Bad brake pedal/light switch — This means communication between you, cruise control and the car is interrupted, and you can’t have immediate manual control of the car.

Bad fuse — Fuses blow to protect the electrical system. Cruise control fuses will do the same, to protect the system and circuits in your car the fuse will break and then need repairing.

Failing speed sensor — Speed sensors are important in cruise control because your car needs to remain at the same speed consistently. Broken speed sensors will affect more than cruise control and need to be serviced urgently

Bad actuator vacuum, hose, or cable –The actuator vacuum is what connects and activates the throttle control. The fault may be with the hoses in the vacuum actuator or the cable linking the system together.

Symptoms of bad cruise control switch

• Symptom 1 — brake pedal does not disengage cruise control

There’s a switch fixed to the bases of the brake pedal and if cruise control does not deactivate when braking then it’s a sign that this switch is faulty.

• Symptom 2 — Hissing noises are heard from under the dash.

The cruise control switch is a vacuum system and for some vehicles, it is mounted near the brake pedals under the dash. If you can hear hissing, it could indicate that the switch or one of the switch’s vacuum hoses is broken.

• Symptom 3 — The cruise control switch/button itself does not work

When trying to turn on the function or while cruising it turns off, this is an indicator of a faulty switch and can be related to wiring issues or the above (1-2) symptoms

• Symptom 4 — A blown fuse

A blown fuse could be a simple error and fix. The switch circuit or fuse may just need to be replaced for the problem to resolve.

Possible Cruise control failure Scenarios

1. Cruise control not working after battery change

• Possible cause — This differs from vehicle to vehicle and among brands. Some drivers’ cruise control malfunctions after jump-starting their battery, and this is because the battery is still discharged. Newer cars have many electronic systems, and most are powered by the battery. So, if the battery is discharged or low-powered, the electrical cruise control system can be affected.
• Solution — Putting your battery on a trickle charger (2-5 amp) for 12 hours or driving on cruise for a couple of hours may resolve this issue.

2. Cruise control turns off while driving

• Possible cause — Damaged speed sensor or actuator, these two could be internally malfunctioning and causing the cruise control to disengage without input from you.
• Solution — Have a technician or mechanic run a diagnostic with the speed sensor and check the actuator hoses and cables.

3. Cruise control works intermittently

• Possible cause — this may relate to the brake pedal switch. If cruise control is intermittently disengaging, it could be a wiring issue with the switch.
• Solution — Have the brake pedal to cruise control switch investigated by a mechanic or technician and determine if there is a faulty wire to blame. You may need to have the switch or some of its parts replaced.

4. Cruise control turns on but will not set

• Possible cause — The brake pedal switch may be the issue. The brake pedal deactivates cruise control and if it is stuck in the open position, it may cause the cruise control to not engage or set properly.
• Solution — Ask your mechanic or technician to check for this issue specifically in their diagnostic and service.

5. Cruise control turns on by itself

• Possible cause — There may be a failure with the Electronic Control Module (ECM) which manages the actuators or Electronic Control Unit (ECU) which controls the speed in your cruise control
• Solution — You could attempt to reprogram the ECU and ECM if you have the computer tools, otherwise take it into a trusted mechanic or technician.

There are many helpful forums run by mechanics and amateurs:  These are always great for solving those specific problems you might experience.

When CC does not set: https://mechanics.stackexchange.com/questions/34795/cruise-control-will-not-turn-on-cannot-be-enabled-nor-set

When CC is faulty after battery change: https://www.vwvortex.com/threads/help-cruise-control-not-working-after-dead-battery.4464553/

For cruise control and other general repairs, watch this channel: https://www.youtube.com/channel/UCf2f4MeZzSksVMe1z3Lp3hw

Can cruise control cause check engine light?

When the check engine light or MIL (Malfunction Indicator Light) is on, the cruise control light may blink to signal that cruise control has been disabled. This is a safety control as the vehicle is programmed to not go on ‘autopilot’ should the engine or mechanical issue relate to the cruise control systems. If the error or fault is with the cruise control systems, then the MIL may be lit for that as well.

How much does it cost to fix cruise control malfunctions?

• For switch repair (parts and labour) it’s estimated at $125- $350
• For fuse repairs, it could be up to $10 to buy the fuse and replace it yourself in a few minutes — there are many helpful YouTube tutorials on simple car repairs like this one.
• For actuator repairs, some cost more than $700
• Therefore, it’s important to know WHAT the issue is to get an idea of HOW MUCH it will cost you.

Does cruise control malfunction trigger the check engine light?

The function of a check engine light or MIL (Malfunction Indicator Light) is to communicate engine or mechanical failures in your vehicle to prevent an accident on the road. The MIL can be lit for simple reasons like the gas cap is loose. Should your CC system fail or run incorrectly, the MIL could light up. Often when there are other failures or engine faults, the MIL will light and the cruise control with a flicker to signal it has been disabled for safety reasons. Once the cruise control or other issues are fixed, all the lights should go back to being turned off.

Author: Dave Johnston

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Why Is My Cruise Control Not Working? 6 Common Reasons

By: Author Zach Reed

When your cruise control stops working, it can be quite an inconvenience. In this expert guide, we’ll talk about the most common reasons it can fail.

If you’re old enough, you can probably remember driving on road trips , or even just on your daily commute to work, before cruise control was a thing. It can be downright exhausting.

Unfortunately, even modern-day cars can have a failing cruise control system and it can seem like you’ve been thrown back into the stone ages.

Okay, that might be a bit dramatic, but it really can be annoying when cruise control stops working. But why does that happen?

The most common reasons that your cruise control might stop working include a bad cruise control switch, a blown fuse or relay, problems with the engine or transmission, a faulty vehicle speed sensor, a bad brake pedal switch, or a broken cruise control cable.

If your car’s cruise control isn’t working, it can be a major pain.

What do you do if your cruise control stops working? Here are some of the most common reasons why it might not be working, and how to fix it!

To fully understand why cruise control stops working on a car, we researched the most common reasons so that you know exactly what’s wrong with it.

Since we’ve already done the research for you, all you need to do is run through the list of common reasons below and you’ll be able to get your cruise control figured out in no time.

How Does Cruise Control Work?

Before we get into the reasons that cruise control might not be working in your car, it’s important that we first explain how the cruise control system works in the first place.

By understanding how cruise control works and what components are involved, you’ll have a much better understanding of why the issues below can prevent cruise control from working.

So, how does cruise control work?

The cruise control system in your car is made up of a few different parts. There’s a cruise control switch, which is usually located on the steering wheel, that turns the system on and off.

There are also fuses and relays that power the system, and a speed sensor that tells the system how fast the car is going. These sensors report back to the cruise control module, which controls a cruise control servo.

This servo is what actually controls the throttle of your car , and it’s what tells the car to speed up or slow down to maintain the cruise control speed.

Finally, there’s a brake pedal switch that tells the system when you’re braking and a cruise control cable that connects the accelerator pedal to the cruise control system.

All of these parts and pieces work together to enable your car to maintain a set speed without you having to constantly adjust the accelerator.

Now that we know how the cruise control system works, let’s take a look at some of the most common reasons why it might not be working in your car.

Most Common Reasons That Cruise Control Isn’t Working

1. bad cruise control switch.

One of the first things to check if your cruise control isn’t working is the switch. This is usually located on the steering wheel or stalk. If it’s a bad switch, then it might need to be replaced.

This is usually pretty easy to check because you can just try to turn the system on and see if it engages.

In most cars, a light will illuminate somewhere on your dash (or on the button itself) once you press the switch to turn on cruise control.

So if you hit the button or switch but you don’t see a light illuminate anywhere, it could be an indication that the button or switch itself is bad. But that’s not the only reason you might not see the light turn on.

2. Blown Fuse or Relay

Another pretty common reason that cruise control might not be working is because of a blown fuse or relay.

These are usually located in the fuse box under the hood. If you think this might be the case, then you can just check the fuse box to see if there’s a blown fuse or relay.

If you don’t see a blown fuse or relay, it could still be the problem. Sometimes the fuse or relay might not look blown but could still be bad.

In this case, you might need to use a multimeter to test the fuse or relay to see if it’s still good. Typically, a relay will audibly “click” when it’s activated, so if you don’t hear the clicking noise, the cruise control relay might be bad.

3. Engine or Transmission Problems (Check Engine Light)

If the cruise control system is engaged but the car doesn’t seem to be responding, it could be because of engine or transmission problems.

These types of problems can be pretty serious, so it’s definitely something you’ll want to get checked out by an experienced mechanic or technician. Often, this will be accompanied by your check engine light turning on.

Furthermore, sometimes the cruise control system won’t even engage if there are overarching issues with the engine or transmission that would prevent it from working.

This is more commonly seen in newer cars where the electronics and computer system are so advanced and integrated that it will prevent you from using cruise until you fix the underlying issues.

4. Faulty Vehicle Speed Sensor

One of the most common reasons that cruise control might not be working is because of a faulty vehicle speed sensor. This is the sensor that tells the cruise control system how fast you’re going.

If it’s not working correctly, then the cruise control system won’t be able to maintain the correct speed.

In most cases, a faulty speed sensor will need to be replaced. However, sometimes you can clean the sensor and fix the problem. This is usually pretty easy to do and you can find instructions online or in your car’s owner’s manual.

You usually have to jack your car up and remove the wheel to get to the sensor, so make sure you’re being careful and following the owner’s manual!

5. Bad Brake Pedal Switch

Another common reason for cruise control not working is a bad brake pedal switch. This switch is located on the brake pedal itself and tells the cruise control system when you’re pressing the brakes.

If it’s not working correctly, then the cruise control system won’t know when you’re trying to stop and it could cause some serious accidents .

In most cases, you’ll need to replace the switch if it’s not working correctly. However, if you’re lucky, you might be able to clean it and get it working again.

Sometimes it can even just come unplugged and all you need to do is plug it back in. Either way, this is a pretty easy fix that you should be able to do on your own.

6. Broken Cruise Control Cable

Last up on our list of the most common reasons cruise control might not be working is a broken cruise control cable. This is the cable that runs from the cruise control module to the throttle body.

If it’s broken, then the cruise control system won’t be able to tell how much gas to give the engine and it won’t work correctly.

The vast majority of the time, you need to replace the cruise control cable if it’s broken. However, sometimes it might have just come loose or come off the track at the throttle body and you just need to reattach it correctly.

This cable has to have the correct amount of tension in order to operate properly, so you might want to leave this one up to the professionals if you aren’t confident about it!

How Hard is it to Fix Cruise Control on Your Car?

Now that you know why your cruise control might not be working, you’re probably wondering if it’s something you can handle on your own. That really depends on what the problem is.

As you can see from the list above, some of the issues are pretty easy to fix, like a blown fuse or bad brake pedal switch, while others are pretty difficult, like engine or transmission problems.

If you’re having trouble with your cruise control, the best thing to do is take it to a qualified mechanic or technician and have them diagnose the problem.

They’ll be able to tell you exactly what’s wrong and how difficult (and expensive) it will be to fix. Most of the issues with cruise control are fairly simple and inexpensive, and the convenience of the feature usually makes the repair worth it!

Conclusion on Common Issues For Cruise Control

There are a few different reasons why cruise control might not be working in your car anymore, including a broken switch, a blown fuse or relay, or faulty speed sensors.

Whatever the problem may be, figuring it out is the first step so you can go back to cruising on the roads without a problem.

We hope this article helped shed some light on why cruise control might not be working in your car.

Be sure to take it to a professional if you’re having any trouble so they can help you get back on the road safely!

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7 Reasons Why Cruise Control is Not Working

Cruise control has been around since the late 1950s. There was a time when you could only find this convenient feature in a few model vehicles. Nowadays, it seems like virtually every model vehicle on the road has a cruise control feature.

Cruise control not engaging seems like a trivial issue, but the inability to activate this convenient feature can certainly dampen any road trip. While cruise control failures “rarely” pose safety risks, determining the root cause is necessary to restore its use. Let’s look at the common causes of cruise control malfunction.

Table of Contents

Cruise Control Problems (Accelerating or Maintaining Speed)

If your cruise control feature malfunctions and stops working altogether, you may not think it’s an immediate concern. You’ll probably figure that you just can’t use cruise control anymore until you get the problem fixed.

However, the problem with your cruise control might be related to an acceleration issue too. In fact, there are components of cruise control which can have an adverse effect on the acceleration if those components are bad. That is why you need to be aware of what causes cruise control issues.

Common Causes of Cruise Control Not Working

There are several possible causes of cruise control not working. Below are the top 6 most common causes. Check each of these areas and see if they’re the cause of your cruise control issue. In many cases, the remedy to the problem is not that complicated or expensive.

1) Cruise Control Switch

The cruise control switch is what you use to set your cruising speed. This information is transmitted to the engine control unit and cruise control module in order to sustain the acceleration speed.

If the contacts inside the cruise control switch were to wear out, then the module and unit might not receive the necessary speed information it needs to keep the acceleration going. In response, the system will deactivate entirely and cancel the current cruise acceleration set.

2) Brake Light Switch

Normally, you press the brake pedal to turn off cruise control. The brake light switch must be detected by the cruise control system for this to happen.

If it cannot detect the switch, then cruise control will disable itself automatically until the brake light switch issue is fixed.

A faulty brake light switch can also cause your brake lights to stay on .

3) Blown Fuse

The electrical components of the cruise control system are protected by fuses. Like inside your house, it is possible to blow a fuse. This will cause the cruise control system to turn off until the fuse is replaced.

4) Check Engine Warning Light

If the check engine warning light comes on, it usually means there is a problem with your transmission or engine. Once the engine control unit detects this problem, it may disable your cruise control system in response as a safety precaution.

Until you fix the engine issue, the cruise control will stay disabled.

5) Vehicle Speed Sensor

Most vehicles have a few vehicle speed sensors to transmit speed information about the vehicle to the engine control unit and the cruise control module. The only way your cruise control module is going to know how fast the vehicle is moving is if the vehicle speed sensors feed this information to it.

If the module cannot detect the speed because of faulty speed sensors, then the cruise control system will automatically deactivate.

6) Electrical Issues

There are several electrical components connected to the cruise control system. The connectors and wiring harnesses, and ground straps are definitely components that you need to check when the cruise control stops working.

Make sure the source of the voltage is still supplying power to the system as well. If any of these components are loose or damaged, then it would explain why the cruise control isn’t functioning.

7) Loose or Broken Cruise Control Cable

Older vehicles that are equipped with cruise control have two throttle cables – one for the gas pedal and one for the cruise control system.

These cables may stretch over time. If the cruise control cable has stretched or is broken, the cruise control system will not be able to operate the throttle plate properly.

Adaptive Cruise Control Specific Problems

Adaptive cruise control gives an extra layer of convenience while driving, as it adjusts your vehicle’s speed based on the distance to the car in front of you. However, this presents additional causes of cruise control failure.

One issue you might face is obstructed sensors. Both radar and cameras are important components of the adaptive cruise control system. When there’s dirt, debris, or ice covering these sensors, your cruise control can stop functioning. To prevent this, regularly clean your vehicle’s sensors, making sure they’re unobstructed.

Separately, failed cameras can also be a culprit. If the cameras aren’t working correctly, you may see an error warning. It’s best to get this checked by a professional to determine whether the cameras need repair or replacement. Hopefully it’s not as they are an expensive replacement.

Apart from cameras, adaptive cruise control relies heavily on radar technology for proper functioning. A misaligned or malfunctioning radar sensor can cause your system to behave irregularly. Again, consult a qualified technician to diagnose the issue and, if needed, recalibrate or replace the radar system.

Safe Driving Without Cruise Control

When cruise control systems fail, it presents challenges adjusting to speed management without the consistent pacing it provides. But there are a few things you can do.

• Focus on scanning gauges more frequently to stay actively aware of mph.
• Avoid zoning out on long hauls.
• Set phone alerts every few miles to remind checking current travel speed.
• Know highway speed limits well so mentally benchmarking against them continues subconsciously.
• Take frequent breaks stretching legs to re-energize alertness until able to diagnose cruise faults.
• Consider alternative adaptive cruise technologies equipped on newer vehicles if financially viable, providing automated incremental slowing when closing distances on lead cars.
• Remain vigilant of lead car distances and your own speed fluctuations.
• Utilize open lanes with fewer surrounding vehicles if possible, reducing needs for continual minor adjustments.
• Stay alert with renewed attention and defensive awareness absent cruise controls automated convenience until repairs are completed.

Intermittent Fault Identification

When cruise controls experience occasional yet repeating failures, meticulously logging every instance of malfunction helps uncover patterns guiding toward root causes.

Date and time each cutoff or disengagement that happens while activated. Detail any environmental or operational conditions present such as: weather, bumpy vs smooth roads, stop & go traffic versus highway speeds.

Reviewing complete repair histories alongside these event logs indicates if previously replaced components only provided temporary fixes before subsequent re-failure later on. Share documented patterns of when and how interruptions occur with shop technicians to guide their pathway tracing and component testing.

The goal is determining if specific elements like an old switch, wire insulation or solder joint chronically breaks down only under certain temperature, vibration or usage strain thresholds.

Cruise Control Repair Costs

So, your cruise control decided to take a break, and now you’re wondering how much it’ll cost to fix it. Well, repair costs vary depending on the specific issue and your vehicle’s make and model. This section will provide you with an idea of what to expect in terms of expenses.

Let’s look at the common reasons for cruise control problems and their approximate price range for replacement or repair:

• Faulty Cruise Control Switch – $100 – $200. A bit more expensive than a brake light switch.
• Blown Fuse  – $5 – $30. Quick and affordable to replace.
• Faulty Brake Light Switch  – $50 – $150. Can be a bit pricier but still manageable.
• Defective Speed Sensor – $100 – $300. Falls somewhere in the middle of the price spectrum.
• Throttle Control System Issues – $200 – $600. More expensive to diagnose and fix.
• ABS-related Problems  – $200 – $1,000. Can also be quite costly to repair.
• Broken Vacuum Line  – $50 – $150. Applicable to older systems and typically inexpensive to fix.

How Does Cruise Control Work?

If you normally drive long distances, especially on the interstate, then cruise control lets you take your foot off the gas while the car maintains the same speed, giving your leg a rest. This may seem like merely a luxurious feature rather than a necessity, but many people depend on it for safe driving.

There are several different types of cruise control systems, but all implementations share similar basic components. There is a sensor to measure vehicle speed, a throttle position sensor , and some mechanism to control the throttle plate without the use of the gas pedal.

Outputs from the speed and throttle position sensors allow the engine computer to determine how much the throttle plate needs to open or close to maintain speed.

Cruise control systems may also use sensors in the transmission, taking the current gear and engine vacuum into account. Throttle position will be different in each gear at a given speed, especially when driving over hills.

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13 thoughts on “7 Reasons Why Cruise Control is Not Working”

have a 2006 VW new Beetle my cruise works fine until i go to pass some one ,any idea what would cause it to do this? ?

When you hit the gas pedal to overtake, you might be disengaging cruise control.

i’ve heard that bad fuel can create such issue. As stated above, the Check Engine light will come on as part of the safety features to inform you something is not right. Cruise control picks up on this and shuts down.

The engine light was flashing then it stopped then started again, the cruise control is disabled but did come on a couple of times but went off when the engine needed to accelerate, the engine shakes when I. Accelerate too.

my aftermarket cruise on a 2013 Kio Rio LX wont light up

You’re going to have a hard time with finding help for that without providing the name and model of the aftermarket system. It might be best to take it to someone so they can troubleshoot in person.

My cruise indicator light will turn on but when I try to set the speed the light will shut off and not turn back on until I restart the engine. Any ideas what it might be?

Did you ever figure this one out. I got 99 Durango does this too

Cruise control goes rite into high speed when turned on,what could the problem be?

This helped me a lot. I got more out of your 6 reasons a cruise control may not work, than when I inquired about the same situation and got nothing. Thank You, Janet M.

Thanks for the feedback, Janet!

Helpful. Thank you

Mine is a mercedes benz c180, 2002 model my cruise control have just stopped working . So what are the possible causes

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Cruise Control Not Working? 9 Potential Causes

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Cruise control reduces stress and fatigue on long drives, but if the system isn't working properly, it can become dangerous. If your vehicle's cruise control isn't working, one of the following nine issues may be the root cause.

How Cruise Control Works

Cruise control is a system to maintain vehicle speed without direct driver input. When you want to engage cruise control, you first turn the system “On” with a button or switch. However, this alone does not start the cruise control. When you “Set” cruising speed, the cruise control module (CCM) records the current speed, then takes control of the throttle body to maintain vehicle speed. When vehicle speed increases or decreases (due to wind or hills, for example), the CCM decreases or increases throttle body opening accordingly.

By modulating engine speed, the CCM can maintain your desired cruising speed on the highway. You can increase or decrease cruise speed by tapping a button or lever, and you can cancel cruise control by hitting the “Cancel” or “Off” buttons or stepping on the brake.

Throttle body control has changed over the years. Early systems used a vacuum motor and cable, but these eventually changed over to electric motors. Most recently, with the development of drive-by-wire or electronic throttle control systems (ETCS), cruise control is built into the engine control module (ECM), which controls the throttle body electronically.

Basic cruise control systems still require the driver to pay attention to changing road and traffic conditions. Adaptive cruise control systems, sometimes called "smart" cruise, use radar or laser detection to maintain safe distances from vehicles ahead. Some adaptive cruise control systems merely reduce engine speed to maintain distance, but some of the newest adaptive cruise control systems can also engage the brakes to slow or stop the vehicle. Still, even with adaptive cruise control, it's important that drivers never take their eyes off the road.

Why Is My Cruise Control Not Working?

There are a few basic ways that cruise control can fail, depending on how the system is designed. You may not be able to do much about ETCS cruise control systems, but there are a few things you can check:

Brake Light Switch – As cruise control is automatically cancelled by depressing the brake, some vehicles may disengage cruise control if it cannot detect the brake light switch.

Brake Lights – In some systems, cruise control is disabled when a brake light is blown. Aftermarket lighting, such as LED brake light conversion, might trick the CCM into thinking a brake light is blown, as LED bulbs draw less current than incandescent bulbs.

Fuses and Relays – On some vehicles, fuses and relays are used to protect the cruise control actuator circuit . If the fuse is blown or the relay is faulty, the system won’t work.

Spiral Cable – Many vehicles mount the cruise control switch on the steering wheel. A faulty spiral cable may have an open circuit, preventing the switch from contacting the CCM.

Control Switch – If the internal contacts wear out, the cruise control switch may not be able to contact the CCM. This might disable cruise control completely, or it might not react to the cancel or accelerate functions.

Check Engine Light – On some modern vehicles, particularly those equipped with ETCS, cruise control may be disabled if there is an engine or transmission problem .

Vacuum Leak – Some older vehicles used vacuum actuators to control the throttle body during cruise control operation. If there is a leak, such as a cracked hose or tube, the system won’t work. A vacuum leak might cause the engine to idler higher or set a fuel trim code.

Vehicle Speed Sensor – There are usually multiple vehicle speed sensors (VSS) on any given vehicle. The CCM might use a VSS feed from the ECM, instrument cluster, or transmission. If that signal is lost, the CCM can’t detect vehicle speed, disabling cruise control.

Electrical Problems – As most cruise control systems use electrical or electronic components, any diagnosis should include a thorough check of source voltage, wiring harnesses, and connectors. Anything loose or broken could disable the system entirely.

If your cruise control isn’t working properly, avoid using it until it is repaired. A faulty cruise control system may not cancel on demand, which will create a safety hazard for you and those around you. After assessing your cruise control yourself, take your vehicle to a trusted mechanic for a check or a couple diagnosis and repair.

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Car advice put simply.

Cruise control not working — causes and fixes

Troubleshoot and fix non-functioning cruise control in your vehicle..

Cruise control is one of the most useful modern driving features which makes every longer journey easier. It lets you travel at a constant speed and reduces the pressure on your foot caused by frequent gas pedal pressing.

However, in case of the cruise control not working , it’s important to deal with the problem right away. If you turn the system on while it malfunctions, you might not be able to turn it off during the drive. So, you can follow this guide to get all the information about the most common reasons for failing cruise control and get advice on how to fix it.

What’s cruise control and how does it work?

To get a better understanding of possible reasons behind malfunctioning cruise control, it’s time to deal with the basics behind the system. Cruise control is an electronic system that helps you maintain a certain speed level for extended periods without holding your foot on the gas pedal.

While driving regularly, the pressure with which you push the gas pedal is transmitted to the throttle position sensor which controls the throttle valve. If you press the pedal further down, the valve gets open, and more air flows into the engine.

On the other hand, if you apply less pressure, the valve is nearly closed, slightly letting air in. The engine control unit (ECU) uses these measurements to calculate fuel injection and translate the pressure into driving power and speed.

The modern cruise control system controls the throttle position sensor and other sensors and electronically simulates the pressure on the gas pedal. Even some older vehicles have cruise control, but in these cars, cruise control used a cable that physically maintained pressure on the accelerator.

With modern improvements, there’s also the introduction of adaptive cruise control which uses several drive assist systems to maintain your speed. These include lane assist and the possibility to increase and lower the speed by pressing the button.

Modern cruise control also measures the speed of the car in front of you in the lane to maintain a safe distance. If you are a car guy, you probably enjoy having control over the machine yourself. However, cruise control is extremely useful during a long highway ride, since it reduces the fatigue and pain of pressing hte4 accelerator for hours.

Reasons behind cruise control not working

Now that you know how the cruise control system works, it’s time to dig deep into the possible reasons behind its malfunction. First, we come by electrical issues since this is an electrical feature after all. However, there are also other possible reasons, so let’s take a look at a few of the most common ones:

• Problems with the throttle body
• Malfunctioning sensors
• Blown fuse and electrical issues
• Faulty brake pedal switch
• Bad mechanical cruise control cable

All of these reasons can make your cruise control ineffective and the worst thing is if it malfunctions while you are using it. It’s also a bad thing since cruise control saves gas while on long journeys down the highway, so you’ll want to fix the problem based on the listed reasons as soon as possible.

How do throttle body issues affect cruise control?

In case the throttle body valve gets stuck, or the throttle body gets clogged, you’ll have a hard time using your cruise control system. The worst thing that could happen in this case is if the gas pedal gets stuck in position, which also affects your driving regardless of the cruise control.

You can clean your throttle body with specific products to be able to use cruise control again and to ensure proper air intake into your engine. Modern cruise control systems lock the throttle valve in a position to ensure even air intake, so if the valve malfunctions, you won’t be able to use it.

Bad or malfunctioning sensors

As mentioned, cruise control is an electrical system and it uses the readings of multiple sensors to adjust and maintain your driving speed. Out of these sensors, the throttle position sensor and the speed sensor are most relevant for the system’s operation.

We already mentioned how the throttle position sensor affects the control of the throttle valve, and the speed sensor monitors the driving speed. It sends information to the ECU regarding the traction control system by the speed readings. If the sensor fails, you’ll likely experience some strange speedometer action and an anti-lock braking system ( ABS ) warning light on the dashboard .

So, the cruise control system might also fail, as it uses the readings of these sensors as well as the data of the ECU regarding traction control and ABS usage.

Blown fuse or electrical issues

One of the easiest fixes for a bad cruise control system is to just replace a blown fuse. If this happens, you can just take a look at the fuse box by referring to the owner’s manual of your vehicle for the exact location. Usually, there’s a fuse box under the hood or just the left of the steering wheel in the car’s interior.

If there’s a circuit short, the fuse might blow, and simply replacing it will bring the system back on again. Also, other electrical issues can occur such as a bad connection with the control buttons on the steering wheel or electrical connections

Bad brake pedal switch

The cruise control system in your car is connected to the brake pedal switch. It’s the switch that communicates with your tail lights and turns them on as you press the brake pedal. If the switch goes bad, the signal gets interrupted, and it can reflect on your cruise control system as well.

Most cruise control systems are designed to disengage as you press the brake. So, if the computer believes the brakes are pressed due to a faulty switch, it will turn off the cruise control system.

Worn mechanical cable for older cruise control systems

As mentioned, old cars with cruise control often use a cable that locks the accelerator in place as you activate the system. This ensures that the accelerator pressure stays the same during the time the system is active.

The mechanical system also uses an actuator and hoses, and these could all wear off due to frequent usage. So, if any of the mechanical components malfunction, you won’t be able to use the cruise control system.

Fixing a failed cruise control system

If your cruise control system works on some occasions, while it fails on others, don’t use it while driving. It’s not safe and the best thing you can do is inspect the system based on the reasons behind a malfunctioning cruise control.

You can do some repairs yourself, including testing and replacing a blown fuse. On the other hand, you’ll need the help of the mechanic to replace a bad actuator in mechanical systems or to fix the brake pedal switch.

Overall, if you spot your cruise control not working, you shouldn’t use it while driving until you make the repairs. Some systems will fail on some occasions, while you’ll sometimes be able to use them regularly. It’s still better to inspect the system based on the common reasons behind its failure listed in this guide and make proper repairs.

This way, you can save yourself some trouble, along with gas and effort while driving with the cruise control system active.

What could cause the cruise control to stop working?

A blown fuse or a faulty brake pedal switch could cause the cruise control to stop working, along with malfunctioning sensors.

How do I know if my cruise control fuse is blown?

You can know if your cruise control fuse is blown by taking a look at the fuse box, and you can find the fuse box location in the owner’s manual.

Where is the fuse for the cruise control?

The fuse for cruise control is located within the fuse box under the hood or at the left of the steering wheel.

How much money does it cost to fix cruise control?

It costs anywhere from $10 for a replacement fuse, to $500 for the actuator or the throttle body repair to fix the cruise control system.

Filip is a lifelong car enthusiast with over 3 years of experience writing about cars and had worked as a mechanic apprentice for over 5 years, gaining hands-on expertise in automotive mechanics. At REREV, he combines his passion for cars with his comprehensive knowledge to provide readers with a unique blend of technical insight and engaging storytelling that sets the bar high for automotive content.

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Why Cruise Control Stops Working

I have a '93 Jeep Grand Cherokee, and the cruise control has completely stopped working. Any idea what the problem might be?

Cruise control has gone through so many different iterations over the years, it's almost comical. At the beginning it was purely mechanical, then it was vacuum-actuated, then it was electromechanical, and now the state of the art is to directly control the electronic throttle body. Your version is electromechanical, which means that the throttle pedal is directly connected to the throttle body through a cable, and the cruise control is achieved by way of a servomotor that sucks in that cable and holds it in place. All cruise-control systems are mandated to use designs that don't interfere with throttle control when they fail, which is what yours has done. The question then becomes, what is the root cause?

There are two cheap potential fixes to look at first. Since cruise is operated by electrical switches, it's possible the contacts have worn out or become corroded. Taking those apart for inspection and cleaning eliminates that possibility. You should also check the fuses related to the system, and if you have a multimeter, check that the wiring from the fuse box to the module is intact. (Set it to measure resistance: If there's a reading, the line is good; if there's no reading, the wire may be broken.) Now, about the expensive fix. Cruise-control modules from this era are not known for their long-term durability. Usually you'll see failure in the module's electronics, the plastic gears, the motor, or the various mechatronic contrivances that make these contraptions work. Complicating matters, these are neither cheap nor easy to replace. At a dealership you'd be staring down a $900-plus repair bill. If cost is an issue, and considering the age of the vehicle, it might make more sense to just use the pedal the old-fashioned way and live with it.

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10 potential reasons why your cruise control is not working

What is cruise control.

Cruise control is a way of maintaining a selected constant speed without needing to use the accelerator pedal. It is closely integrated with the traction control and braking systems.

How do I know if my cruise control is not working?

Cruise control systems have become steadily more complex over time. This means it's not always easy to pinpoint why a cruise control system is not working - especially in newer models.

What happens if my cruise control stops working?

While cruise control can make long journeys easier and less stressful, if the system fails it can be dangerous. For example, it may not be possible to cancel a faulty cruise control system - which could have dire consequences. So if your cruise control only works sometimes, or not at all, avoid using it until you can find a solution - by taking it to a trusted mechanic. Alternatively, you may decide to research the issue and attempt to fix it yourself. However, the safest option is to take it to a garage.

Note: You should always check your vehicle handbook for any fault remedy before carrying out any work on your vehicle. If you are unsure of what is required to fix any problems, please consult a professional.

In this article we'll look at 10 of the most common reasons for a malfunctioning cruise control system.

How do cruise control systems work?

Before we begin, it's important to understand how cruise control systems work.

You must first activate the system by pressing the cruise control 'on' button - normally located by the steering wheel. However, this does not activate the system by itself.

Once you've set the cruising speed, the cruise control module (CCM) notes the present speed, then takes over the throttle body to maintain the speed of the car.

As the vehicle’s speed increases or decreases (due to inclines, for example), the CCM makes adjustments to the throttle body opening.

The desired cruising speed is maintained by modulating the engine speed. This speed can be adjusted, or cruise control can be cancelled by pressing 'cancel' or 'off'. The system is also cancelled if the driver applies the brakes.

Paying attention on the road

Cruise control systems are available with varying levels of complexity.

Aside from basic cruise control systems, ‘adaptive cruise control systems’ are often fitted with radar for maintaining safe distances between vehicles behind and ahead. Some even control engine speed in response to nearby vehicles.

Whichever cruise control system your car has, it's critical you still pay attention to other road users in order to avoid collisions. Cruise control should not be considered a fully ‘autonomous’ driving system.

Electronic throttle control systems (ETCS)

With electronic throttle control systems, cruise control is integrated with the engine control module (ECM). These are also known as 'drive-by-wire' systems because of their semi-autonomous nature.

Note that ETCS system failures may require the attention of a trained mechanic.

What are the top reasons for cruise control failure?

Brake light switch fault.

Cruise control systems will not activate if they cannot detect a working brake light switch. This is because cruise control systems automatically cancelled once the brakes are applied.

How do you repair a break light switch fault?

If you have some understanding of car mechanics, you may be able to examine the brake light switch, which is located below the steering wheel. However, because such systems have multiple wires, it can be difficult to identify any fault.

You may decide to invest in a multi-application service tool/OBD scanner, which can plug directly into your engine’s computer and pinpoint any fault with your brake light switch.

However, rather than spend money on an OBD scanner and learn how to use it, many people simply replace the brake light switch. Many aftermarket brake light switch replacements are available.

Cruise control switch function: worn out

It's possible for a cruise control switch to wear out over time by being pressed too much or too hard. It may also get damaged by drink spillages or by solvent used when cleaning the steering wheel.

This could mean the CCM cannot be communicated with, potentially disabling cruise control entirely.

How do you check if the cruise control switch function has worn out?

You may be able to confirm this is the issue with an OBD scanner. However, you can check this by looking to see if the cruise control light appears on the dashboard when the switch is operated.

Brake light issues

Some cruise control systems will not activate if they detect a blown brake light. Some aftermarket LED lights draw less current than factory-new lights, which can make the cruise control think a light has been blown.

Spiral cable fault

The spiral cable connects electrical circuits in the steering column to elements in the steering wheel - such as the cruise control activation button. If the spiral cable has an open circuit, the switch may be unable to communicate with the CCM.

Check engine light

Engine or transmission problems may automatically lead to the disabling of cruise control - especially if it's of the ETCS type.

Fuses and relays

The cruise control actuator circuit may be protected by fuses or relays. If these are blown or damaged, the cruise control system may not activate.

Vacuum leak

On some older cars vacuum actuators are used to manage the throttle body when cruise control is activated. A cracked tub or shoe could result in a leak, preventing the system from working. It might also make the engine idle higher.

Vehicle speed sensor fault

The modern car often has multiple speed sensors. If the ECM speed sensor signal used by the CCM is lost, cruise control will not work.

ABS sensor faults

If any of the ABS sensors are faulty (there is normally one on each wheel), the cruise control system will not activate.

Electrical problems

Electrical components are integral to cruise control systems, and should therefore be thoroughly checked in the event of a fault. Issues with source voltage, connectors and wiring harness could disable the system.

Credit: xzotica65 - stock.adobe.com

Ford cruise control not working?

If the cruise control system on your Ford is not working, the most likely culprits are still those listed above. However, experienced Ford mechanic “ Build It Make It ” on YouTube argues that burned out brake lights are the most common reasons for cruise control failure - especially on models such as the Ford F150.

The next most common reason for faulty Ford cruise control is a blown fuse . Fuses can be checked with a multimeter if you have the required experience, and then replaced.

Build It Make It then lists a broken brake light switch as being the next most common reason. A faulty shifter actuator is listed as the next most common fault cause. This is a lock to ensure you’re not gear shifting when you don’t have the brake engaged. Since the car cannot detect which gear you’re in, it will deactivate the cruise control as a safety measure.

And the fifth most common reason for Ford cruise control not working is faulty control switches . Unless you have extensive automotive mechanical experience, it may be best to have your control switches replaced by a trained Ford mechanic.

More possible Ford cruise control fault reasons

Auto Repair Guys on YouTube list the following as common reasons for Ford cruise control not working:

• Faulty cruise control fuse (often located under glove box) Note: newer Fords may not have fuses for cruise control
• Faulty control switches
• Faulty brake light switch (sometimes integrated with the cruise control switch)
• Faulty ‘cork spring’ or ‘spiral cable’ - as mentioned this connects the steering wheel controls to the car’s computer.
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CarPart  ·  April 6, 2023

Why Is My Cruise Control Not Working? Causes & Cost to Fix

• cruise control
• cruise control failing

The cruise control feature is especially helpful and convenient on long drives. The system keeps the vehicle moving at a steady speed without you minding the accelerator the entire time. Considering how it’s such a straightforward feature, why would it stop working?

A cruise control system can stop working due to (1) a mechanical problem (2) a blown fuse (3) a damaged speed sensor (4) a faulty brake pedal switch or (5) electrical problems. Repair costs can start at $100 and go beyond $500, depending on the affected part, labour costs, and the car brand and model.

Finding your cruise control not working isn’t the end of the world, but it’s undoubtedly something you’d want to fix sooner rather than later. Learn about the possible reasons for a failed cruise control and what you need to fix them.

How Do Cruise Control Systems Work?

You’ll be better equipped in diagnosing or fixing cruise control failure if you understand how it is supposed to work. Let's quickly recap what cruise control systems are and how they function.

Cruise control is a driver-assist feature that maintains your vehicle’s speed even when you take your foot off the accelerator. That’s a helpful feature, especially when driving long distances, as it gives your leg a break from holding the pedal down continuously.

Despite its presence in the market for decades now, few vehicles have it as a standard feature. The few models that come with it have one of three types, i.e.:

• Some have conventional speed limiters.
• Others are smarter with adaptive cruise control. 
• Still others have semi-autonomous versions.

You can learn more about how cruise control systems work by reading our in-depth guide here.

For now, though, we’re focusing on when cruise control systems stop working. You’ll know your car has that problem when you experience any of these symptoms:

• The cruise control system doesn’t engage at all.
• The system doesn’t maintain a consistent speed.
• The cruise control warning light is on or flashing.
• The onboard diagnostics system shows a cruise control fault code.

Experiencing one or more of the above means your cruise control system is faulty or has failed. You’ll want to have a technician troubleshoot it for you.

Why Isn’t My Cruise Control Working?

When you find your cruise control not working, the root cause is one of the following:

1. Mechanical Problems

The first reason your cruise control stops working is a mechanical problem. Although newer cruise control systems are heavily computerised, they still use mechanical parts to function correctly.

That’s especially true with older vehicles relying more on mechanical than electronic parts.

For example, there might be a faulty actuator or a damaged cable (linking the actuator to the throttle). Besides that, the system might also have a leaking or damaged hose.

Mechanical faults are typically fixed by replacing the affected part with a new one.

2. Blown Fuse

Cruise control systems require electrical power to function correctly. So, if the system stops working despite its components being in excellent condition, the problem could be a blown fuse .

When a fuse blows, it prevents electrical current from flowing to the cruise control system’s circuit. That’s why you’ll experience problems like the system not engaging or the warning light appearing on your dashboard.

You’ll find the cruise control fuse inside the fuse box, along with all the others your car relies on. Replace it with an identical fuse to restore power to the circuit and get it working again.

3. Damaged Speed Sensor

You might already know that your car has several speed sensors on its wheels or differentials. Those sensors are designed to measure the speed of each wheel and feed that information to the car's onboard computer.

That wheel speed data is used to inform the traction control system. However, the cruise control system also uses that data for its operations.

A damaged speed sensor will send the wrong data about wheel speed, assuming it sends any data at all. Unfortunately, that will also disrupt the cruise control system and stop it from working correctly.

A failed speed sensor needs troubleshooting to find the correct solution. For example, the issue could be a loose or cut wire connection, or you might need to replace the affected sensor with a new one.

4. Faulty Brake Pedal Switch

A faulty brake pedal switch could also be the reason for a cruise control system that isn't working.

The primary purpose of the brake pedal switch is to turn on your brake lights when you step on the pedal. That way, drivers behind you will know your vehicle is slowing down or going to stop.

You might think that one doesn’t have anything to do with the other, but think again, because the brake pedal switch and cruise control are directly connected.

Your cruise control system is designed to deactivate when you step on the brake pedal. The system knows you’re doing that because it’s connected to the brake pedal switch.

As a result, a stuck or faulty brake pedal switch can continuously deactivate your cruise control system and prevent it from working correctly.

Fixing that problem will require you to replace the brake pedal switch.

5. Other Electrical Issues

Last but certainly not least, your cruise control system can stop working due to other electrical issues. That’s because the system requires electrical power to function, so the lack of it will stop the system from working.

For example, a burnt or damaged wire could have stopped supplying power to the system. Alternatively, an electrical fault like a power surge or short circuit could have also damaged the system.

Fixing that problem will require a thorough electrical system diagnosis and repair by a trained technician.

How Much Does It Cost to Fix My Cruise Control?

The price to fix your cruise control varies greatly. For example, the price you pay when you have a Toyota cruise control not working will differ from the repair cost of a Renault Trafic cruise control.

The price will depend on a few different factors, such as:

• Car brand and model
• Replacement part costs
• Labour costs

A minor repair (e.g. replacing a faulty brake switch) could be roughly $100 to $400, while something more intensive could go above $500. Remember that these costs are typically higher for imported or luxury vehicles, as most repairs usually are.

The best thing you can do is call a few workshops and get a precise quotation for your particular vehicle. That way, you’ll know exactly how much to pay to fix your cruise control problems.

Start by using the Directory at CarpartAU to find the nearest workshops in your area. Then, use the contact details on the Directory to call them and get estimates for your cruise control repairs.

Once you find the best deal, bring in your and have them resolve the problem for you.

By Ray Hasbollah

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Home & renters insurance, car repair estimates, read car content, jerry data & research, why is my cruise control not working.

Why does my cruise control not work?

Less common (but still possible) causes of cruise control not working, how can i save on car insurance, faulty brake pedal switch, defective vehicle speed sensor.

• Disconnect the battery
• Disconnect the electrical connector
• Unbolt and remove the speed sensor
• Coat the new speed sensor’s O-ring with transmission fluid
• Install a new speed sensor 
• Reconnect the battery and test

Throttle system

Broken vacuum line.

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Cruise Control stopped working....

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So I've found a few people ask this question here using search but nothing really answered my question. I need to know what to look for before I take it into a shop (btw would any normal car shop even know where to start with fixing this or would I have to take it to a dealership?).... I'm not incredibly knowledgeable with mechanic type things with cars so I'm not sure where to look. I do know where the fuses are... but I don't know which one or ones would work cruise control... I looked around on the manual and can't seem to find anything about it! Any advice is appreciated very much.  

define stopped working. In the sequence of setting the cruise control, at what point does the car not do what is expected. ie when you click cruise does the light come on, and the car not maintain speed, or is it as though the botton doesn't work. Is the check engine light on, if so what codes do you have. It could be as simple as a bad switch, and as complex as a funky module. be more descriptive in what the car is or isn't doing  

I press the button and nothing happens... like the green cruise control light in the dash doesn't turn on like it used to. No check engine light, no codes.... idk if that would mean the button isn't working or cruise control won't turn on for some reason  

I won't have the manual in front of me for a whole. But I must ask you to have someone drive behind you to see if your brake lights are constantly on. Don't just start the car and get out while parked, it may not show a problem unless you're driving. KOT  

I see 4 fuses, two are under the hood and the other two are some where in the steering column. The two under the hood are labeled HTR VLV/CLTCH 10 amp fuse, though this maybe on the manual transmission only. The second is STRG CTLS 10amp fuse. The two that are some where in the steering column are 2 amps each. One is inline with the actual "on/off" switch. While the other is inline with the "Set/Coast" push button. They appear to be between the clock spring and the car. This is for a 2005 CTS, which is your's anyways. For my 2006 CTS, it doesn't make sense to have the clock spring involved because it shouldn't go through it. But there again, I've seen some strange things go through some strange areas. KOT  

Do you have Cruise buttons on the steering wheel? If so, when you press left button does it stay in bottom and is there light when its on?  

Yes but the set button will not set the speed  

ok I will have someone check behind me for brake lights! and I will check those 2 fuses in the hood.... I'm not sure how to go about checking the ones in the steering column... I guess I'll figure it out haha and I don't have cruise control buttons on the steering wheel  

Not to be a smartass, but is the slider switch on the stalk in the on position? Sometimes it gets bumped by accident.  

yeah haha its on. I definitely know how to use it... I was in love with it until it broke  

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