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.
Shut water pump engine off (WP 0022). Turn battery disconnect switch to OFF position
(WP 0007). Open pump operator's panel housing (WP 0325). Disconnect wire 4075
(red) from water pump engine hourmeter. Turn battery disconnect switch to ON position
(red) at water pump engine hourmeter connector to a known good ground.
If 22 to 28 VDC are not present, repair wire 4075 in pump operator's panel
wire harness (TM 9-2320-325-14&P), or replace pump operator's panel wire
harness (WP 0459).