Stop Lamps

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The STOP LPS 20A fuse in the engine wiring harness junction block supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to both the VEH STOP 10A fuse and the CHMSL 10A fuse. Battery positive voltage is also supplied by the STOP LPS 20A fuse in the engine wiring harness junction block to the turn signal switch. The current flow is now to the stop lamps which are grounded at G401. The center high mounted stop lamp (CHMSL) is grounded at G410 or G203 for pick ups.

For trailer wiring, a separate stop lamp circuit is connected through the engine wiring harness junction block from the CHMSL 20A fuse to the trailer wiring harness.