TEST OR INSPECTION
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.
Connect cab instrument panel wire harness OVERHEAD WARNING switch connector.
Disconnect main wire harness crew cab wire harness connector. Turn battery
disconnect switch to ON position (WP 0007). Turn Service Drive Lights On
(TM 9-2320-347-10). Put EMERG MASTER and OVERHEAD WARNING switches to
on position (WP 0004). Check for 22 to 28 VDC between main wire harness wire 1630
(green) at crew cab harness connector, terminal J and a known good ground.
If 22 to 28 VDC are present, go to Step 10.