GM Service Manual Online
For 1990-2009 cars only

BRAKE Lamp

Battery voltage is applied through the gauges fuse 4 brake indicator when the ignition switch is in the RUN or start positions. The brake indicator is lit by having ground applied to it by one of the following circuits:

    • The brake pressure differential switch
    • The ABS system
    • The park brake pull button switch
    • The park brake actuator
    • The ignition switch, bulb check in START

ABS Lamp and AUTO PARK Lamp

These lamps indicate brake related problems, but not in the foundation brakes. Their functions and circuits are covered in the Antilock Brake System and Park Brake sections.