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). Disconnect body condenser
wire harness crew cab air conditioner fresh air fan connector. Turn battery disconnect
switch to ON position (WP 0007). Put crew cab air conditioner/heater switch to on
position (WP 0008). With a test lead set, check for 22 to 28 VDC at wire 4042 from
body wire harness crew cab air conditioner/heater fresh air fan connector, terminal 1 to
a known good ground.
If 22 to 28 VDC are not present, go to Step 37.