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Page Title:
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE IN ALL SPEEDS (LOW, MEDIUM, AND HIGH) (Cont) |
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 DRAFT
TB 9-2320-279-13-1
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE IN ALL SPEEDS
(LOW, MEDIUM, AND HIGH) - Continued
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2.
KNOWN INFO
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TEST OPTIONS
Fan control switch, fan control switch
harness, and AC heater/evaporator blower
Visual inspection.
resistor harness connections OK.
Does AC heater/evaporator
REASON FOR QUESTION
POSSIBLE PROBLEMS
blower motor operate in low,
If AC heater/evaporator
medium, and high fan control
AC heater/evaporator blower does not
blower operates in all
switch positions after
operate in all speeds.
blower speed switch
reseating loose connections?
positions, problem has
AC heater/evaporator blower resistor harness
been corrected.
orange wire faulty.
Fan control switch harness orange wire faulty.
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AC heater/evaporator blower resistor harness
brown wire faulty.
Fan control switch harness brown wire faulty.
AC heater/evaporator blower resistor harness
Go to Step 3 of this
red wire faulty.
NO
fault.
Fan control switch harness red wire faulty.
AC heater/evaporator blower resistor faulty.
YES
Fan control switch faulty.
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Go to Step 15 of this fault.
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3.
KNOWN INFO
TEST OPTIONS
Fan control switch, fan control switch
Visual inspection.
harness, and AC heater/evaporator blower
REASON FOR QUESTION
resistor harness connections OK.
Does AC heater/evaporator
If AC blower operates in at
blower motor operate in at
POSSIBLE PROBLEMS
least one speed, power to
least one fan control switch
AC heater/evaporator blower does not
fan control switch and AC
position (low, medium or
operate in all speeds.
heater/evaporator blower
high)?
motor circuit is OK.
AC heater/evaporator blower resistor harness
orange wire faulty.
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Fan control switch harness orange wire faulty.
AC heater/evaporator blower resistor harness
brown wire faulty.
Fan control switch harness brown wire faulty.
Go to work package
AC heater/evaporator blower resistor harness
NO
Evaporator Blower
red wire faulty.
Does Not Operate).
Fan control switch harness red wire faulty.
AC heater/evaporator blower resistor faulty.
YES
Fan control switch faulty.
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0011-4
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