Operation CHARM: Car repair manuals for everyone.

Stoplamp Switch




The stop lamp switch operates the vehicle stop lamp and generates signals to control several electronic modules on the car. The switch is a normally open switch when the brake pedal is in its rest position. When the brake pedal is pressed, the pressure on the stop lamp switch plunger is released, the switch is closed, and the brake lights turn On. If the cruise is on at the time the brake pedal is pressed, the cruise will also be disabled. While the brake pedal is pressed, the stop lamp switch is closed, and thus cruise will not engage.

Steering wheel theft deterrent systems can possibly cause the switch to get over adjusted. If you notice that the customer's switch is over adjusted, fix the adjustment, verify that the customer has used a steering wheel theft deterrent in the vehicle, and inform the customer that the stop lamp switch can become over adjusted when they use a steering wheel theft deterrent system.