What would cause my cruise control not to work?
Having your cruise control fail can be frustrating, especially on long drives where it provides convenience and helps maintain consistent speed. At Kevin's Autos, with years of experience in car maintenance and repair, we’ve seen a variety of reasons why cruise control systems stop functioning. In this article, we’ll explore the most common causes and what you can do about them.
1. Faulty Brake Pedal Switch
The cruise control system is designed to disengage when you press the brake pedal. If the brake pedal switch is faulty or misaligned, it may send a constant signal to the cruise control system that the brakes are engaged, preventing it from activating. This is one of the most common issues we encounter in our shop.
2. Blown Fuse
Like many electrical components in your car, the cruise control system relies on a fuse to function. If the fuse responsible for the cruise control system blows, the system will stop working entirely. Checking and replacing a blown fuse is a relatively simple fix.
3. Damaged or Disconnected Wiring
Over time, the wiring that connects the cruise control system to other components can become damaged or disconnected. This can happen due to wear and tear, rodent damage, or improper repairs. A thorough inspection of the wiring is necessary to identify and resolve this issue.
4. Malfunctioning Speed Sensor
The cruise control system relies on the vehicle's speed sensor to maintain a consistent speed. If the speed sensor is malfunctioning or providing incorrect data, the cruise control system may not work properly or at all.
5. Issues with the Throttle Control System
Modern vehicles often use electronic throttle control systems, which are integral to the cruise control system. If there’s an issue with the throttle body or its sensors, the cruise control may fail to engage or maintain speed.
6. Faulty Cruise Control Module
The cruise control module is the brain of the system, responsible for processing inputs and controlling the throttle. If the module itself is faulty, the entire system may stop working. Diagnosing this issue typically requires specialized equipment.
7. Driver Error or Settings
Sometimes, the issue isn’t mechanical or electrical but rather a misunderstanding of how the system works. For example, certain vehicles require the car to be traveling at a minimum speed before cruise control can be activated. Double-check your vehicle’s manual to ensure you’re using the system correctly.
What Should You Do Next?
If your cruise control isn’t working, here are some steps you can take:
- Check the fuse box for a blown fuse and replace it if necessary.
- Inspect the brake pedal switch for proper alignment or damage.
- Look for any visible damage to the wiring connected to the cruise control system.
- Schedule a diagnostic appointment with a trusted auto repair shop to identify and fix more complex issues.
Why Choose Kevin's Autos for Cruise Control Repairs?
At Kevin's Autos, we specialize in diagnosing and repairing all types of vehicle issues, including cruise control problems. With decades of experience and a commitment to customer satisfaction, we’ll ensure your car is back on the road in no time. If you’re in the Mountain View, CA area, give us a call at (650) 965-7112 to schedule an appointment today!
Frequently Asked Questions
What is the most common failure of a cruise control system?
Blown Fuse
One of the most common reasons for a malfunctioning cruise control system is a blown fuse. Fuses are designed to protect electrical components from power surges and prevent damage. If the fuse for the cruise control system has blown, it will prevent the system from functioning.
How to reset cruise control?
If you notice that your speed fluctuates after setting it, your system may be malfunctioning. To determine if you have a problem, try resetting the system. To do this, turn the cruise control off by disengaging the switch in your car. Next, turn the system on again, set a speed, and reapply cruise control.
How do I know if my cruise control fuse is blown?
You can check to see if a fuse is blown by checking the fuse box and locate the fuse that corresponds to your cruise control. You'll need to remove the fuse and perform a visual inspection to see if a filament on the inside is broken, indicating that the fuse is bad. If the filament is intact it's most likely fine.
What are the signs of a failing cruise control?
Not Maintaining Consistent Speed
When you've set the cruise control, it should always maintain the speed you've set. If you notice that your speed fluctuates after setting it, your system may be malfunctioning. To determine if you have a problem, try resetting the system.
How do I know if my cruise control switch is bad?
A malfunctioning switch can show both symptoms. It may not turn on at all or does not turn off even after applying the brake. In that case, the car will continue accelerating, which may lead to an accident. Also, continuous acceleration may cause the related components to overheat and then get damaged permanently.
How do I get my cruise control to work?
To use cruise control, you can typically press buttons on your steering wheel to activate the system, set your speed, adjust your speed up or down within the system, and deactivate the system. Using cruise control lets you set a speed for your car to maintain even if you take your foot off the gas.
Why would my cruise control suddenly stop working?
The cruise control fault can be caused by several different components in some cases. This can be a faulty vehicle speed sensor, wheel speed sensor, faulty brake switch, faulty cruise control switch, or an issue with the computer itself internally.
Can a bad fuse cause cruise control not to work?
Seeing your vehicle cruise control is powered by an electronic control unit, it is susceptible to damage by a blown fuse or other certain electrical damage. Common causes for your vehicle's cruise control to not work include: Bad Fuse - Common cause of failed cruise control system.
Can I fix cruise control to my car?
You can't add cruise control system to your car. It requires a lot electronics and fitment in hardware of car. That can be done only at the time of manufacturing.
What does it cost to fix cruise control?
The average cost for a Cruise Control Module Replacement is between $630 and $643. Labor costs are estimated between $50 and $63 while parts are typically priced around $581. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
