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.

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VOLTAGE TEST

(1) Disconnect AC harness wire 1158 from low

pressure switch connector (WP 0041).

(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 1158 at low pressure switch 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 1158

to low pressure switch connector and go to

Step 13 of this fault.

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

OFF and go to Step 12 of this fault.

HEMAC154