TEST OR INSPECTION
Turn battery disconnect switch to OFF (WP 0007). Check for continuity across
wire 2740 from driver side relay to a known good ground.
If continuity is present, replace driver extendable light relay (WP 0373).
If continuity is not present, repair wire 2740 in rear body wire harness if
repairable (TM 9-2320-325-14&P), or replace rear body wire
harness (WP 0461).
Remove rings, wristwatches, neck chains, and any other jewelry before working
around vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry
and tools may short across electrical circuits and cause damage to equipment, or
severe burns or electrical shock to personnel.
Turn battery disconnect switch to OFF position (WP 0007). Remove cab instrument
panel C (WP 0311). Disconnect cab instrument panel wire harness driver flood switch
wire harness connector from DRIVER FLOOD switch. Disconnect wire 1146 (violet)
from driver side extendable floodlight relay (WP 0373). Install jumperwire between wire
1146 (violet) and a known good ground. With a test lead set, check for continuity across
wire 1146 (violet) from driver flood switch wire harness connector, terminal 5 to a known