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.
Release bumper turret control discharge switch (WP 0004). Install bumper turret
control cover and tighten four screws. Remove driver side crew cab panel (WP 0499).
Remove pump house panel Q (WP 0540). Disconnect main wire harness pump
operator's panel wire harness connector. While an assistant pushes and holds bumper
turret control discharge switch (WP 0004), with a test lead set, check for 22 to 28 VDC
between main wire harness DV1 wire 2837 (gray) at main wire harness pump house
wire harness connector, terminal 16 and a known good ground.
If 22 to 28 VDC are present, repair wire 2837 in pump operator's panel wire
harness if repairable (TM 9-2320-325-14&P), or replace pump operator's
panel wire harness (WP 0459).