Can turn signal switch affect brake lights?

On vehicles that use the same lights for brakes and turn signals, a bad turn-signal switch can cause the lower brake-lights not to work. A bad turn-signal switch may interrupt the brake light circuit when it should not. A broken wire to or from the switch may also cause the lower brake-lights not to work.

How do you reprogram a brake light switch?

How to Adjust a Brake Light Switch

1. Locate the brake light switch. You’ll find it under the dashboard, near the top of the brake pedal.
2. Push the button to adjust the on/off switch. Apply a good amount of pressure and the switch will either turn on or off.
3. Determine if the button needs to be pushed in or out.

Why would my tail lights work but not my brake lights?

The electrical ground is one of the things you should also check if the taillights are working and brake lights are not. This could be the possible issue, especially when the brake light switch is functional. Check for bad electrical ground which may be a result of corroded or damaged wires.

What happens when brake light switch fails?

If your brake switch malfunctions, the rear brake lights won’t illuminate, and the driver behind you won’t know that you’re slowing down, causing a major safety hazard. Now, this could indicate that a brake light bulb in the rear has burnt out or that you’ve got a defective brake light switch.

How do you check a brake light fuse?

Test the Fuses: Use the owners manual or the lid of the fuse panel to find the brake light fuse. Then use a test light to check the fuses for the brake light and BCM fuses and replace if any are blown. If the fuse is blown it could be caused by a shorted wire to ground, a melted light socket or a weak fuse.

How long does it take to fix a brake light switch?

It takes less than an hour, and if you use an after-market replacement motor, you can save almost $200 by doing the job yourself.

What to do if your brake light switch is not working?

If there is no voltage at the brake switch, the fuse bight be blown. See how to check a fuse. In some cars, a brake light switch may contain a pair of switches inside. Both will need to be tested. See the service manual for your car for the correct procedure.

How much does it cost to replace a brake light switch?

Brake light switch replacement. The part is not very expensive ($15-$45) and can be ordered from a dealer or online. The replacement of a brake light switch in a repair shop can cost from $55 to $115 (part and labor).

What is the function of the brake light switch?

The brake light switch serves two major functions. First, it turns on the brake lights when a driver presses the brake pedal. Second, it sends the signal to the vehicle computer that brakes are applied. A car with a faulty brake light switch is UNSAFE to drive.