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.
Put GROUND SWEEPS switch to off position (WP 0004). Remove cab instrument
panel B (WP 0311). Turn battery disconnect switch to OFF position (WP 0007).
Disconnect cab pump control wire harness GROUND SWEEPS switch connector. Put
battery disconnect switch to ON position (WP 0007). Check for 22 to 28 VDC between
cab pump control wire harness wire 2854 (red) at GROUND SWEEPS switch
connector, terminal 5 and a known good ground.
If 22 to 28 VDC are not present, repair wire 2854 in cab pump control wire
harness if repairable (TM 9-2320-325-14&P), or replace cab pump control
wire harness (WP 0443).