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.
Stop crew cab air conditioner (WP 0008). Shut vehicle engine off (TM 9-2320-347-10).
Turn battery disconnect switch to OFF position (WP 0007). Remove crew cab air
conditioner/heater control box cover (WP 0201). Start crew cab air conditioner
(WP 0008). With a test lead set, check for 22 to 28 VDC at wire 1394 from relay module
block crew cab air conditioner condenser fan relay, wire 1394 terminal to a known good
If 22 to 28 VDC are present, repair wire 1394 in body condenser wire
harness if repairable (TM 9-2320-325-14&P), or replace body
condenser wire harness (WP 0436).
If 22 to 28 VDC are not present, replace crew cab air conditioner/heater
control box (WP 0201).