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. While an assistant holds personnel cab FOAM SYSTEM
switch to off position (WP 0004), check for continuity across FOAM SYSTEM switch
from terminal 4 to terminal 5.
If there is continuity, repair wire 2831 (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 personnel cab FOAM SYSTEM
switch (WP 0315).