Backup Lamp: Description and Operation

CIRCUIT OPERATION
Back-Up Lamps
In the RUN position, the ignition switch connects circuit A2 from the Power Distribution Center (PDC) to circuit A22. Circuit A22 feeds a bus bar in the fuse block. A 40 Amp fuse in the PDC protects the A2 and A22 circuits.

Circuit F20 is one of four circuits that connects to the fuse block bus bar fed by circuit A22. Circuit F20 supplies power to the back-up lamp switch. On 3-speed automatic transaxle 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 F20 to circuit L1. Circuit L1 feeds the back-up lamps. A 10 Amp fuse, in cavity 8 of the fuse block, protects F20 and L1 circuits.

Ground Circuit
Circuit Z1 provides ground for the back-up lamps. The Z1 circuit has more than one grounding point. It also supplies ground path for the tail lamps, parking lamps, headlamps, side marker lamps, rear license plate lamp, stop lamps and turn signals.