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 cab instrument
panel B (WP 0311). Disconnect cab pump control wire harness PUMP TO TANK switch
connector. Check for continuity across TANK TO PUMP switch, from terminal 5 to
terminal 4, when switch is in closed position.
If there is continuity, repair wire 2770 (blue) in cab pump control wire
harness if repairable (TM 9-2320-325-14&P), or replace cab pump
control wire harness (WP 0443).
If there is no continuity, replace cab TANK TO PUMP
switch (WP 0315).