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Backup 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 B/U LP 25A fuse in the engine wiring harness junction block supplies battery positive voltage to the normally open backup lamp switch. When driver places the gear selector lever is in the REVERSE position, the backup lamp switch closes and the current flow is from the backup lamp switch through the VEH B/U 15A fuse to the backup lamps. The backup lamps are grounded at G401.

For trailer wiring, a separate backup lamp circuit is connected through the engine wiring harness junction block from the TRLR B/U 10A fuse to the trailer wiring harness.

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