Those switches are failure prone so it could be a bad switch, or it could be the plastic pad that moves the switch, which pushes through the tap on the brake pedal. If the plastic bumper is gone you can usually use one of the push type "Christmas tree" fasteners sold to hold body panels in place. Just buy one that just pushes through the hole.
The switch is part number 938103S700. To replace it you remove the panel under the steering column by removing the screws shown. Then look on the top of the brake lever to find the switch. On the switch is a lock that you pull down, now rotate the switch 45 degrees so the locking threads release, and the switch can be pulled out. Unplug the connector. Now take the new switch and connect the wiring harness to it, then slip it into place in reverse of the old switch. Hold the brake pedal up and push the switch in until it bottoms out on the bumper on the pedal.
Let go of the pedal, if it stays up and the switch doesn't turn on the brake lights push the pedal and let it return, verify that the brake lights only come on when the pedal is pushed down and go off when it is up. Now rotate the switch counterclockwise to lock it in place and push the lock back into place.
https://www.youtube.com/watch?v=kNdQ2ptPNMg
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Saturday, January 25th, 2025 AT 12:39 PM