AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM DUCTS DURING AC OPERATIONS (Cont)

DRAFT

TB 9-2320-279-13-1

AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM

DUCTS DURING AC OPERATIONS - Continued

WARNING

Remove rings, bracelets, wristwatches, neck chains, and any other jewelry before working around

vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry or tools may short

across electrical circuits or terminals and cause damage to equipment or severe burns or

electrical shock to personnel.

Wear protective goggles and nonleather gloves when servicing air conditioner system. Failure to

comply may result in injury to personnel.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

VOLTAGE TEST

(1) Disconnect AC harness wire 1154 from AC

compressor clutch connector (WP 0023).

(2) Turn fan control switch to an on position (low,

medium, or high) (WP 0004).

(3) Turn AC temperature control switch to the coldest

position (fully clockwise) (WP 0004).

(4) Turn engine start switch ON (TM 9-2320-279-10).

(5) Place positive (+) probe of multimeter on AC

harness wire 1154 at AC compressor clutch

connector.

(6) Place negative (-) probe of multimeter on a known

good ground.

(a) If 22 to 28 vdc are not measured, turn engine

start switch OFF, connect AC harness wire 1154

to AC compressor clutch connector and go to

Step 11 of this fault.

(b) If 22 to 28 vdc are measured:

1. Turn engine start switch OFF

(TM 9-2320-279-10).

2. Recover R-134a refrigerant (WP 0050).

3. Replace AC compressor (WP 0023).

4. Replace AC condenser dryer (WP 0025).

5. Evacuate and charge system (WP 0050).

6. Verify repair, go to Step 27 of this fault.

HEMAC153