Brake Light Switch Replacement: How to Complete a Brake Light Switch Fix

Replacing a brake switch is a simple DIY job. Most brake light switch replacement takes about 15 to 30 minutes and requires basic tools.

Brake Switch Location

The brake switch is located under the dashboard, above the brake pedal. To find it, lean over the driver side floor mat and look up at the brake pedal mechanism. The switch is a small plastic component mounted where the brake pedal arm contacts it. It may be clipped into a bracket or held in place with a screw.

How to Replace a Brake Switch

Step 1. Disconnect the negative battery terminal. This prevents any electrical shorts while working on the switch.

Step 2. Locate the brake switch under the dashboard above the brake pedal. Most switches are mounted on a bracket that contacts the brake pedal arm.

Step 3. Disconnect the electrical connector from the switch. Press the tab and pull the connector straight off.

Step 4. Remove the old brake switch. If it is clip-mounted, press the release tabs and twist or pull the switch out of its bracket. If it is screw-mounted, use a screwdriver to remove it.

Step 5. Install the new brake switch. Push it into the bracket until it clicks into place, or screw it in. Make sure the switch contacts the brake pedal arm properly.

Step 6. Reconnect the electrical connector. Push it onto the new switch until it clicks.

Step 7. Reconnect the battery and test the brake lights. Press the brake pedal and check that the brake lights come on and turn off when you release the pedal.

When to Replace the Brake Switch

Replace the brake switch if the brake lights do not work, if they stay on constantly, or if the cruise control and shift interlock stop working. The switch is a wear item that can fail over time due to repeated use, heat, and moisture exposure. A new brake switch is inexpensive, usually between $10 and $40, making it one of the cheapest brake repairs you can do.