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 driver side crew
cab panel (WP 0499). Remove pump house panel Q (WP 0540). Turn battery
disconnect switch to ON position. Put GROUND SWEEPS switch to on position
(WP 0004). Disconnect main wire harness valve control wire harness connector DV1.
With a test lead set, check for 22 to 28 VDC between main wire harness wire 2772
(gray) at main wire harness valve control wire harness connector DV1, terminal 10 and
a known good ground.
If 22 to 28 VDC are present, repair wire 2772 in valve control wire harness if
repairable (TM 9-2320-325-14&P), or replace valve control wire
harness (WP 0463).