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.
Determine which crew cab air conditioner/heater control panel is installed on vehicle for
this Step. If model TDH 02 is installed on vehicle, check for voltage at terminals 1, 4, and
9. If model TLK 38S is installed on vehicle, check for voltage at terminals 2, 3, and 6.
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 panel (WP 0202). Turn battery disconnect switch to ON
position (WP 0007). Check for 22 to 28 VDC at crew cab air conditioner control panel,
terminal 9 for model TDH 20 or terminal 2 for model TLK 38S.
If 22 to 28 VDC are present, go to Step 52.