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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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4.
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
AC heater/evaporator blower operates in at
blower motor operate when
least one speed.
If AC heater/evaporator
fan control switch is in the
blower operates at high
POSSIBLE PROBLEMS
high speed position?
speed, high speed blower
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.
AC heater/evaporator blower resistor harness
Go to Step 12 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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5.
KNOWN INFO
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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
AC heater/evaporator blower operates in at
blower motor operate when
least one speed.
If AC heater/evaporator
fan control switch is in the
AC heater/evaporator blower resistor harness
blower operates at
medium speed position?
orange wire OK.
medium speed, medium
speed blower circuit is OK.
Fan control switch harness orange wire OK.
POSSIBLE PROBLEMS
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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 9 of this
NO
red wire faulty.
fault.
Fan control switch harness red wire faulty.
AC heater/evaporator blower resistor faulty.
YES
Fan control switch faulty.
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0011-6
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