AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE IN ALL SPEEDS (LOW, MEDIUM, AND HIGH) (Cont)

DRAFT

TB 9-2320-279-13-1

AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE IN ALL SPEEDS

(LOW, MEDIUM, AND HIGH) - 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.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

CONTINUITY TEST

(1) Disconnect AC heater/evaporator blower motor

resistor harness connector from AC heater/

evaporator blower motor resistor (WP 0036).

(2) Set multimeter switch to ohms.

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

evaporator blower motor resistor harness brown

wire at AC heater/evaporator blower motor resistor

connector.

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

heater/evaporator blower motor resistor harness

brown wire at fan control switch harness connector,

terminal 2.

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

evaporator blower motor resistor harness brown

wire (see Appendix A) or replace AC heater/

evaporator blower motor resistor (WP 0036).

Verify repair, go to Step 15 of this fault.

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

evaporator blower motor resistor (WP 0035).

Verify repair, go to Step 15 of this fault.

CONTINUITY TEST

(1) Disconnect fan control switch harness brown wire

from fan control switch (WP 0031).

(2) Set multimeter switch to ohms.

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

switch harness brown wire at AC heater/evaporator

blower resistor harness connector, terminal 2.

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

switch harness brown wire at fan control switch.

(a) If there is no continuity, repair fan control switch

harness brown wire (see Appendix A) or

replace fan control switch harness (WP 0031).

Verify repair, go to Step 15 of this fault.

(b) If there is continuity, replace fan control switch

(WP 0031). Verify repair, go to Step 15 of this

fault.

HEMAC133

0011-13