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 water pump engine off (WP 0022). Open pump operator's panel
housing (WP 0325). Disconnect pump operator's panel wire harness pump operator's
panel pressure governor 12-terminal wire harness connector. Start water pump
engine (WP 0022). With a test lead set, check for 22 to 28 VDC on wire 4061 from
pump operator's panel pressure governor 12-terminal wire harness connector,
terminal 10 to a known good ground.
If 22 to 28 VDC are present, replace pump operator's panel pressure
governor control panel (WP 0332).