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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CONTINUITY TEST
(1) Disconnect fan control switch harness red wire from
fan control switch (WP 0031).
(2) Set multimeter switch to ohms.
(3) Place positive (+) probe of multimeter on fan control
switch harness red wire at AC heater/evaporator
blower motor resistor harness connector, terminal 1.
(4) Place negative (-) probe of multimeter on fan control
switch harness red wire at fan control switch.
(a) If there is no continuity, repair fan control switch
harness red 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.
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 medium speed position
(4) Place positive (+) probe of multimeter on brown wire
at fan control switch harness connector, terminal 2.
(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 11 of this fault.
(b) If 22 to 28 vdc are measured, turn engine start
switch OFF, and go to Step 10 of this fault.
PLSAC167
