Backup Lamp: Description and Operation

CIRCUIT OPERATION
In the RUN position, the ignition switch connects circuit A2 from fuse 2 in the Power Distribution Center (PDC) to circuit A22. Circuit A22 feeds a bus bar in the fuse block that powers circuit L10 through fuse 15.

Circuit L10 supplies power to the back-up lamp switch. On automatic transmission equipped vehicles, the back-up lamp switch is part of an assembly that includes the PARK/NEUTRAL position switch.

When the operator puts the transmission in REVERSE, the back-up lamp switch connects circuit L10 to circuit L1. Circuit L1 feeds the back-up lamps.

Ground Circuit
Circuit Z13 provides ground for the back-up lamps. Circuit Z13 also supplies a ground path for the tail lamps, parking lamps, rear license plate lamp, stop lamps, and turn signals.