Stop Lamp Switch
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The stop lamp switch operates vehicle stop lamps and signals several electronic modules on vehicle, including the TCM. The switch is normally open when the brake pedal is in released position. When the brake pedal is depressed, pressure on the switch plunger is released and the switch closes. If TCC is engaged when brake pedal is depressed, the TCM will disengage TCC.