To remove a brake light switch, first find it on the bracket on top of the brake pedal. Secondly, you will need to disconnect the wiring harness and untighten the nut. Lastly, untighten the switch from the pedal bracket. To install it, follow the steps of removal in reverse. To adjust, loosen the nut and adjust it with the plunger lightly touching the pedal stop. After adjusting, retighten the nut to secure it in place and reconnect the battery and plug the electric wire into the switch. Check that the brake lights illuminate when the brake pedal is pressed and turn off when it is released, if not readjust the brake light switch.