TB 9-2320-279-13-1
0010-10
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE - Continued
DRAFT
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KNOWN INFO
Wire 1082 OK.
Fan control switch OK.
Fan control switch harness connector OK.
AC heater/evaporator blower motor resistor
harness connector OK.
AC heater/evaporator blower motor power
wire OK.
AC heater/evaporator blower motor OK.
AC heater/evaporator blower motor ground
wire OK.
Circuit breaker No. 11 OK.
POSSIBLE PROBLEMS
Engine start switch faulty.
Wire 1640 faulty.
8.
Are 22 to 28 vdc measured at
engine start switch, terminal
wire 1640, when engine start
switch is in the ON position?
Replace engine start
switch
(TM 9-2320-279-20).
Verify repair, go to
Step 9 of this fault.
NO
YES
Read WARNING on
page 0010-11.
WARNING
Repair wire 1640 (see
Appendix A) or notify
Supervisor.
Verify repair, go
to Step 9 of this fault.
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TEST OPTIONS
Voltage test.
Multimeter.
REASON FOR QUESTION
If voltage is measured, wire
1640 is faulty.
If not,
engine start switch is
faulty.
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KNOWN INFO
Circuit breaker No. 11 OK.
Engine start switch OK.
Wire 1640 OK.
Wire 1082 OK.
Fan control switch OK.
Fan control switch harness connector OK.
AC heater/evaporator blower motor resistor
harness connector OK.
AC heater/evaporator blower motor power
wire OK.
AC heater/evaporator blower motor OK.
AC heater/evaporator blower motor ground
wire OK.
POSSIBLE PROBLEMS
None
9.
Does AC heater/evaporator
blower operate?
Fault not corrected.
Notify Supervisor.
NO
YES
Read WARNING on
page 0010-11.
WARNING
Fault corrected.
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TEST OPTIONS
Verify repair.
REASON FOR QUESTION
If AC heater/evaporator
blower operates, fault has
been corrected.