DRAFT
TB 9-2320-364-13&P-1
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE IN ALL SPEEDS
(LOW, MEDIUM, AND HIGH) - Continued
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
WARNING
6.
KNOWN INFO
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Read WARNING on
Fan control switch, fan control switch
TEST OPTIONS
harness, and AC heater/evaporator blower
resistor harness connections OK.
Voltage test.
Are 22 to 28 vdc measured on
AC heater/evaporator blower operates in at
red wire at fan control switch
least one speed.
harness connector,
REASON FOR QUESTION
terminal 1, when fan control
orange wire OK.
If 22 to 28 vdc are not
switch is in the low speed
measured, AC heater/
Fan control switch harness orange wire OK.
position?
evaporator blower will not
operate at low speed.
brown wire OK.
Fan control switch harness brown wire OK.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
POSSIBLE PROBLEMS
Go to Step 8 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.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
WARNING
7.
KNOWN INFO
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Read WARNING on
TEST OPTIONS
Fan control switch, fan control switch
harness, and AC heater/evaporator blower
resistor harness connections OK.
AC heater/evaporator blower operates in at
across AC heater/evaporator
least one speed.
REASON FOR QUESTION
blower motor resistor
harness red wire?
orange wire OK.
heater/evaporator blower
Fan control switch harness orange wire OK.
motor resistor is faulty. If
not, AC heater/evaporator
blower motor resistor
brown wire OK.
harness red wire is faulty.
Fan control switch harness brown wire OK.
Repair AC heater/
Fan control switch harness red wire OK.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
evaporator blower
Fan control switch OK.
motor resistor harness
NO
red wire (see
POSSIBLE PROBLEMS
AC heater/evaporator
YES
blower motor resistor
red wire faulty.
AC heater/evaporator blower resistor faulty.
Verify repair, go to
Step 15 of this fault.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Replace AC heater/
evaporator blower motor
repair, go to Step 15 of this
fault.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
0011-8