Backup Lamp: Description and Operation

In the RUN position, the ignition switch connects circuit A2 from fuse E in the Power Distribution Center (PDC) to circuit A22. Circuit A22 feeds a bus bar in the fuse block that powers circuit F2O through fuse 3.

Circuit F2O 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 F2O to circuit L1. Circuit L1 feeds the back-up lamps.

If the vehicle is equipped with trailer tow, a jumper harness connects circuit B2 in line with circuit L1. Circuit B2 splices to the trailer tow harness.