GM Service Manual Online
For 1990-2009 cars only

The Park Brake Warning System consists of three main components.

    • Daytime Running Lamps (DRL) Module
    • Park Brake Warning Switch
    • Instrument Cluster (I/C)

Power is supplied to the indicator lamp bus from the Gauges Fuse 4 through CKT 39 (PNK) to the Instrument Cluster. Ground is applied to the BRAKE indicator lamp by CKT 33 (TAN/WHT) through the Daytime Running Lamps (DRL) Module and from the DRL module by CKT 1134 (PPL/WHT) through the Brake Switch, which is internally grounded to the frame.