3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Backup Lamp: Description and Operation
Backup Lamp
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.