Brake Light Switch: Description and Operation

The stoplight switch:
- provides power to the stoplamps
- provides a signal to various other systems including:
- anti-lock brake control module.
- Powertrain Control Module (PCM).
- shift lock actuator.
- speed control servo.

Power is provided to the stoplight switch through fuse junction panel Fuse STOP, HAZ (15A) which is hot at all times. With the stoplight switch closed, power is provided to the stoplamps. Ground is provided to the stoplamps through Circuit 57 (BK).