Cruise control stops working when the system loses power, the brake pedal switch fails, or the control stalk breaks
Cruise control is a straightforward electrical system that cuts out for a handful of predictable reasons. The most common culprits are a blown fuse, a faulty brake pedal switch that thinks you're always braking, a broken control stalk on your steering wheel, or a wiring problem between the stalk and the engine computer. Less often, the cruise control module itself fails, but that's rare enough that you should rule out the cheaper fixes first.
The good news: you can narrow down the cause yourself before you spend money at a shop. The bad news: some fixes require a mechanic, but knowing what's wrong will save you from paying to diagnose a problem you've already identified.
Key Takeaways
- A blown fuse is the first thing to check because it's free and takes five minutes—look in your owner's manual for the cruise control fuse location and amperage.
- If the fuse is good, test whether your brake lights work; if they don't, the brake pedal switch is likely broken and needs replacement by a mechanic.
- A cracked or stuck cruise control stalk on your steering wheel often causes the system to malfunction and usually requires steering wheel removal to replace.
- Wiring problems between the stalk and the engine computer are harder to diagnose yourself and typically need a mechanic with a diagnostic scanner.
- If cruise control worked yesterday and stopped today with no warning, a blown fuse is far more likely than a module failure.
Check the cruise control fuse first
Your car's fuse box holds a dedicated fuse for the cruise control system. When that fuse blows, the entire system loses power and stops working. Open your owner's manual and search for "fuse" or "fuse box"—it will show you exactly where the fuse box lives (usually under the dashboard on the driver's side or under the hood) and which fuse controls cruise control.
Pull out the fuse and look at it. A blown fuse has a broken wire inside the clear plastic tube, or the wire looks blackened or melted. If it's blown, replace it with a new fuse of the same amperage (the number printed on the fuse itself). Do not use a higher amperage fuse—that defeats the safety purpose of the fuse. If the new fuse blows again within a week, you have a short circuit somewhere in the cruise control wiring, and you need a mechanic.
If the fuse looks fine, move to the next step. A good fuse doesn't mean cruise control is working, but a blown fuse definitely means it isn't.
Test your brake lights to check the brake pedal switch
The brake pedal switch is a small electrical switch under your dashboard that tells the car when you're pressing the brake. Cruise control is designed to shut off the moment you touch the brake, so if this switch fails, the cruise control system thinks you're always braking and won't engage.
Turn on your headlights and have someone stand behind your car while you press the brake pedal. Do your brake lights come on? If they don't, the brake pedal switch is broken. This is a common failure and explains why cruise control won't work. A mechanic can replace it in under an hour, usually for $150 to $300 depending on your car.
If your brake lights work fine, the brake pedal switch is probably not the problem. Move forward to check the control stalk.
Inspect the cruise control stalk on your steering wheel
The cruise control stalk is the lever or button cluster on the side of your steering column that you use to set and adjust cruise speed. Over time, these stalks crack, get stuck, or develop internal electrical contact problems. If the stalk is physically broken or won't move smoothly, that's your answer.
Try moving the stalk through all its positions—set, resume, accelerate, decelerate, cancel. Does it move freely? Does it click or feel gritty? If it's stuck, cracked, or doesn't click properly, the stalk needs replacement. This usually requires removing the steering wheel and the column cover, which is a job for a mechanic. Expect $200 to $400 in labor plus the cost of the stalk itself.
If the stalk looks and feels fine, the problem is likely in the wiring or the cruise control module, both of which require a mechanic with a diagnostic scanner to pinpoint.
Look for obvious wiring damage under the steering column
The wiring that connects the cruise control stalk to the engine computer runs down the steering column and into the dashboard. If you've recently had steering work done, or if you've spilled liquid near the steering column, wiring damage is possible.
Pop the plastic cover off the steering column (usually held by a few screws or clips) and look for burned, melted, or pinched wires. If you see obvious damage, a mechanic can trace the circuit and repair or replace the damaged section. If the wires look intact, you've ruled out visible damage, and the problem is either internal wiring you can't see or the cruise control module itself.
Do not attempt to splice or tape cruise control wiring yourself. Electrical work on safety systems should be done by someone who can test the repair with proper equipment.
When to take your car to a mechanic
If you've checked the fuse, tested the brake lights, and inspected the stalk and wiring without finding the problem, you need a mechanic with a diagnostic scanner. A scanner plugs into your car's onboard computer and reads fault codes that pinpoint exactly what's wrong—whether it's a failed module, a broken wire, a sensor problem, or something else.
Bring your findings with you. Tell the mechanic: "The fuse is good, my brake lights work, the stalk moves freely, and I don't see wiring damage." This narrows the diagnostic window and saves you money on labor. A proper diagnosis usually takes 30 minutes to an hour and costs $75 to $150, depending on your shop's rate.
Once the mechanic has a code, the repair is usually straightforward—replacing a module, rewiring a connection, or swapping the stalk. The total repair cost depends on what's broken, but most cruise control repairs fall between $200 and $600 when you include diagnosis and parts.
Cruise control failures that happen suddenly versus gradually
If cruise control worked fine yesterday and stopped working today with no warning, a blown fuse is the most likely cause. Electrical components usually fail suddenly when a fuse blows or a wire breaks.
If cruise control has been getting flaky—sometimes working, sometimes not, or working but not holding speed—the problem is more likely a failing stalk, a corroded electrical connection, or a module on its way out. These tend to degrade over time rather than fail all at once. A mechanic's scanner will catch these intermittent faults.
Frequently Asked Questions
Can I drive without cruise control while I wait for a repair?
Yes, cruise control is a convenience feature, not a safety system. Your car is completely safe to drive without it. You'll just have to manage your speed manually, which is how most drivers operate most of the time.
Is cruise control expensive to fix?
It depends on what's broken. A blown fuse costs nothing. A brake pedal switch replacement runs $150 to $300. A control stalk replacement with labor is usually $200 to $400. A module replacement can be $300 to $600. Diagnosis by a mechanic is typically $75 to $150. Start with the fuse check to avoid paying for diagnosis of a straightforward fix.
Why did my cruise control stop working after I got my car washed?
Water can get into electrical connectors under the steering column or in the fuse box during a car wash. If cruise control failed right after a wash, the wiring or connections may have gotten wet. Let the car dry completely (usually overnight) and try again. If it still doesn't work, a mechanic can check for water damage in the electrical connections.
Does a blown cruise control fuse affect anything else?
No, the cruise control fuse is dedicated to that system. A blown fuse will only disable cruise control, not your headlights, wipers, or any other function. This is why checking the fuse first is so useful—if it's blown, you've found your problem.
Can I replace the cruise control stalk myself?
It's possible if you're comfortable removing the steering wheel and column covers, but it requires the right tools and some mechanical skill. Most people find it easier to have a mechanic do it because the steering wheel has an airbag that needs to be handled carefully. If you're experienced with car work, your owner's manual or a repair guide for your specific model will walk you through the steps.