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 COOLER switch
connector. With a test lead set, check for continuity across cab pump control wire
harness wire 4037 (orange) from PUMP COOLER switch connector, terminal 6 to
PUMP COOLER OPEN indicator terminal connector.
If there is no continuity, repair wire 4037 in cab pump control wire harness if
repairable (TM 9-2320-325-14&P), or replace cab pump control wire
harness (WP 0443).