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.

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VISUAL INSPECTION

(1) Remove four screws, washers, lockwashers, and

cover from AC heater/evaporator assembly

(2) Check fan control switch and AC heater/evaporator

blower motor resistor harness for damaged wires

and loose connection.

(a) If wires are damaged, repair wires (see

Appendix A) or replace fan control switch

harness (WP 0031) or AC heater/evaporator

blower motor resistor harness (WP 0036) as

required. Verify repair, go to Step 9 of this fault.

(b) If harness connector is loose, connect

connector. Verify repair, go to Step 9 of this

fault.

connections, go to Step 5 of this fault.

CONTINUITY TEST

(1) Disconnect AC heater/evaporator blower motor

power wire at splice (WP 0034).

(2) Set multimeter switch to ohms.

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

evaporator blower motor power wire at AC heater/

evaporator blower motor resistor.

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

heater/evaporator blower motor power wire at

splice.

(a) If there is no continuity, repair AC heater/

evaporator blower motor power wire (see

blower motor resistor harness (WP 0036).

Verify repair, go to Step 9 of this fault.

(b) If there is continuity, connect AC heater/

evaporator blower power wire at splice and go

to Step 6 of this fault.

HEMAC138