Brake Lamp Switch

DESCRIPTION






The brake lamp switch is located under the instrument panel at the brake pedal arm. The brake lamp switch has three internal switches.

OPERATION
The three internal switches within the brake lamp switch are used for various systems. Among them are:
- Brake lamps
- Antilock brakes
- Speed control
When the brake pedal is in the released position, the plunger on the outside of the switch is pushed inward. In this position, the electrical contacts for one internal switch are open while the electrical contacts for the other two internal switches are closed.
When the brake pedal is depressed, the plunger on the outside of the switch extends outward. This action closes the electrical contacts of one, and opens the electrical contacts of the remaining two internal switches within the brake lamp switch.
Applying the brake pedal completes the circuit to the brake lamps at the rear of the vehicle, thus illuminating the brake lamps and the Center-High Mounted Stop Lamp (CHMSL). If the vehicle is equipped with speed control and it is in use, the brake lamp switch will deactivate speed control when the brake pedal is depressed.