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.
Turn battery disconnect switch to OFF position (WP 0007). Remove personnel cab
instrument panel B (WP 0311). Disconnect cab pump control wire harness switch
connector from non-operating switch. Turn battery disconnect switch to ON
position (WP 0007). Check for 22 to 28 VDC between cab pump control wire harness
wire 1018 (violet) at cab pump control wire harness non-operating switch connector,
terminal 7 and a known good ground.
If 22 to 28 VDC are not present, repair wire 1018 in cab pump control wire
harness if repairable (TM 9-2320-325-14&P), or replace cab pump control
wire harness (WP 0443).