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 139 of 524

TB 9-2320-279-13-1

0012-53

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.

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

HEMAC168

CONTINUITY TEST

(1) Set multimeter switch to ohms.

(2) Turn AC temperature control switch to the coldest

position (fully clockwise) (WP 0004).

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

temperature control switch, input terminal.

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

temperature control switch, output terminal.

(a) If there is no continuity, replace temperature

control switch (WP 0044).

Verify repair, go to

Step 27 of this fault.

(b) If there is continuity, repair AC harness wire

1156 (see Appendix A) or replace AC wiring

harness (WP 0046).

Verify repair, go to Step 27

of this fault.