TEST OR INSPECTION
Disconnect main wire harness crew cab wire harness connector. With a test lead set,
check for 22 to 28 VDC between wire 2803 (grey) from main wire harness crew cab wire
harness connector, terminal D and terminal R to a known good ground.
If 22 to 28 VDC are not present, repair wire 2803 in main wire harness if
repairable (TM 9-2320-325-14&P), or replace main wire
harness (WP 0455).