K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Spot Lamp: Description and Operation
The STOP LPS 20 A 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 10 A fuse and the CHMSL 10 A
fuse. Battery positive voltage is also supplied by the STOP LPS 20 A 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 20 A fuse to the trailer
wiring harness.
