Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Disconnect the blower motor resistors connector.
- Place the ignition switch in the RUN position.
- Place the heater-A/C control in the VENT position.
- Place the blower control in the M 1 position.
- Use a test lamp to backprobe between the blower motor resistor
connector terminal B and ground.
Does the test lamp light?
| --
|
Go to Step 2
|
Go to Step 3
|
2
| Replace the blower motor resistors. Refer to
Blower Motor Resistor Replacement
.
Is the repair complete?
| --
| Go to
HVAC Blower Controls System Check
| --
|
3
|
- Place the ignition switch in the OFF position.
- Disconnect the heater-A/C control connector C 1.
- Use a test lamp, connected to B+, to backprobe the heater A/C
control connector C 1, terminal A circuit 63 (TAN).
Does the test lamp light?
| --
|
Go to Step 5
|
Go to Step 4
|
4
| Locate and repair a poor connection or an open in circuit 63 (TAN).
Is the repair complete?
| --
| Go to
HVAC Blower Controls System Check
| --
|
5
| Replace
the heater-A/C control. Refer to
Control Assembly Replacement
.
Is the repair complete?
| --
| Go to
HVAC Blower Controls System Check
| --
|
