AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE - Continued

DRAFT

TB 9-2320-279-13-1

AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE - 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.

Circuit breakers No. 4, 5, 6, and 10 are always electrically live and can cause severe injury to

personnel. Care must be taken when working around these circuit breakers.

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VOLTAGE TEST

(1) Remove six screws and left heater cover

(TM 9-2320-279-20).

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

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

breaker No. 11 at terminal wire 1082.

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

good ground.

(a) If 22 to 28 vdc are not measured, go to Step 7 of

this fault.

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

switch OFF and go to Step 2 of this fault.

HEMAC136