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.
Install fuse FS 2 (WP 0401). Remove third and fourth warning lights on passenger side
of front cab roof lightbar (WP 0351). Turn battery disconnect switch to ON position
(WP 0007). Turn Service Drive Lights On (TM 9-2320-347-10). Put EMERG MASTER
and ROOF EMERGENCY LIGHTS switches to on position (WP 0004). Check for 22 to
28 VDC between front cab roof lightbar cable assembly wire 1626 (red) at cab roof
lightbar flasher unit, terminals 2 and 8 and a known good ground.
If 22 to 28 VDC are present, go to Step 12.