How to Replace the Auto Brake Light Switch

When the brakes are applied, the brake lights at the rear of the vehicle illuminate and give warning to motorists behind that the vehicle is slowing or stopping. Some brake light problems may be traced to a faulty brake light switch, which is attached to the brake pedal and is activated when the pedal is pressed. Replacement of the brake light switch may be necessary if no brake light will go on when the brakes are applied.

Instructions

1

Peer under the driver's side of the dashboard and locate the brake light switch, which is usually mounted near the upper end of the brake pedal.

2

Disconnect the wiring connector or connectors from the brake light switch by pressing in on the release tabs on the connector while pulling them straight out of the switch.

3

Remove the clip that connects the brake switch plunger to the brake pedal by pulling it out with pliers. Skip this step if the brake switch plunger is not secured to the pedal.

4

Remove the retaining screws from the brake light switch with a Phillips screwdriver. Skip this step if the brake switch in your vehicle has no retaining screws.

5

Depress the brake pedal with one hand to take pressure off the brake switch plunger, then twist the switch with the other hand while pulling it from its mounting bracket. Release the brake pedal.

6

Depress the brake pedal again when you are ready to install the new switch. Twist the switch into position in its mounting bracket under the dashboard. Release the brake pedal to make such it comes to rest against the brake switch plunger. The plunger will activate the brake lights when the brake pedal is pressed.

7

Replace any retaining screws or clips you removed. Push the wiring connector or connectors back into the switch until they are fully seated and click into position.