TB-9-2320-279-13-1

TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM

OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS

DECEMBER 2005

TB-9-2320-279-13-1 - Page 127 of 524

TB 9-2320-279-13-1

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AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM

DUCTS DURING AC OPERATIONS - Continued

DRAFT

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.

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HEMAC163

VOLTAGE TEST

(1) Disconnect AC harness AC condenser assembly

connector (WP 0028).

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

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

harness wire 1155 at AC condenser assembly

connector, terminal A.

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

good ground.

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

start switch OFF and repair AC harness wire

1155 (see Appendix A) or replace AC wiring

harness (WP 0046).

Verify repair, go to Step 27

of this fault.

(b) If 22 to 28 vdc are measured, turn engine start

switch OFF and repair AC condenser assembly

harness black wire (see Appendix A).

Verify

repair, go to Step 27 of this fault.