DRAFT
TB 9-2320-364-13&P-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.
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VOLTAGE TEST
(1) Disconnect fan control switch harness connector
(2) Turn engine start switch ON (TM 9-2320-364-10).
(3) Turn fan control switch to high speed position
(4) Place positive (+) probe of multimeter on orange
wire at fan control switch harness connector,
terminal 3.
(5) Place negative (-) probe of multimeter on a known
good ground.
(a) If 22 to 28 vdc are not measured, turn engine
start switch OFF and go to Step 14 of this fault.
(b) If 22 to 28 vdc are measured, turn engine start
switch OFF and go to Step 13 of this fault.
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 orange
wire at AC heater/evaporator blower motor resistor
connector.
(4) Place negative (-) probe of multimeter on AC
heater/evaporator blower motor resistor harness
orange wire at fan control switch harness connector,
terminal 3.
(a) If there is no continuity, repair AC heater/
evaporator blower motor resistor harness
orange wire (see Appendix A) or replace AC
heater/evaporator blower motor resistor
harness (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.
PLSAC169
