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 personnel cab
instrument panel B (WP 0311). Disconnect cab pump control wire harness FOAM
SYSTEM switch connector. Turn battery disconnect switch to ON position (WP 0007).
Check for 22 to 28 VDC between wire 2816 (red) from cab pump control wire harness
FOAM SYSTEM switch connector, terminals 3 and 5 to a known good ground.
If 22 to 28 VDC are not present, repair wire 2816 in cab pump control wire
harness if repairable (TM 9-2320-325-14&P), or replace cab pump control
wire harness (WP 0443).