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.
Stop water pump engine from pump operator's panel (WP 0022). Turn battery
disconnect switch to OFF position (WP 0007). Remove skid plate grille (WP 0550).
Disconnect main wire harness main 5 connector. Turn battery disconnect switch to ON
position (WP 0007). Start water pump engine (WP 0022). With a test lead set, check
for 22 to 28 VDC at main wire harness wire 4075 (red) from main wire harness main 5
connector, terminal 17 to a known good ground.
If 22 to 28 VDC are present, repair wire 4075 in cab pump control wire
harness if repairable (TM 9-2320-325-14&P), or replace cab pump
control wire harness (WP 0443).
If 22 to 28 VDC are not present, repair wire 4075 in main wire harness
if repairable (TM 9-2320-325-14&P), or replace main wire
harness (WP 0455).