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Page Title:
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE - Continued |
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 DRAFT
TB 9-2320-279-13-1
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE - Continued
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WARNING
2.
KNOWN INFO
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Read WARNING on
TEST OPTIONS
Circuit breaker No. 11 OK.
Voltage test.
Engine start switch OK.
Are 22 to 28 vdc measured on
Wire 1640 OK.
wire 1082 at fan control
REASON FOR QUESTION
POSSIBLE PROBLEMS
switch, when engine start
If 22 to 28 vdc are not
Wire 1082 faulty.
switch is in the ON position?
measured, wire 1082 is
Fan control switch faulty.
faulty.
Fan control switch harness connector loose
or faulty.
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AC heater/evaporator blower motor resistor
harness connector loose or faulty.
AC heater/evaporator blower motor power
Repair wire 1082
wire faulty.
(see Appendix A) or
AC heater/evaporator blower motor faulty.
notify Supervisor.
NO
AC heater/evaporator blower motor ground
Verify repair, go to
wire faulty.
Step 9 of this fault.
YES
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WARNING
3.
KNOWN INFO
TEST OPTIONS
Read WARNING on
Circuit breaker No. 11 OK.
Continuity test.
Engine start switch OK.
Is continuity measured
Wire 1640 OK.
REASON FOR QUESTION
across fan control switch
Wire 1082 OK.
If continuity is not measured,
from terminal wire 1082 to
POSSIBLE PROBLEMS
fan control switch is faulty.
terminal orange wire, when
switch is in high speed (fully
Fan control switch faulty.
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clockwise) position?
Fan control switch harness connector loose
or faulty.
AC heater/evaporator blower motor resistor
harness connector loose or faulty.
AC heater/evaporator blower motor power
Replace fan control
wire faulty.
switch (WP 0031).
NO
AC heater/evaporator blower motor faulty.
Verify repair, go to
AC heater/evaporator blower motor ground
Step 9 of this fault.
wire faulty.
YES
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0010-4
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