Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the HVAC Blower Controls System Check performed?
| --
| Go to
Step 2
| Go to
HVAC Blower Controls System Check
|
2
|
- Place the heater and A/C controller mode switch in the Heat position.
- Place the heater and A/C controller blower motor switch in the
Medium 2 position.
- Disconnect the blower motor resistor/relay connector.
- Place the ignition switch in the RUN position.
- Connect a unpowered test lamp between the blower motor resistor/relay
connector, cavity F for CKT 72 (LT BLU), and ground.
Does the test lamp light?
| --
| Go to
Step 3
| Go to
Step 4
|
3
| Replace the blower motor resistor/relay.
Refer to
Blower Motor Resistor Replacement
.
Is the repair complete?
| --
| Go to
HVAC Blower Controls System Check
| --
|
4
|
- Disconnect the heater and A/C controller C2 connector.
- Connect a J 39200
between the heater and A/C controller pin C, and pin G.
Is continuity present?
| --
| Go to
Step 5
| Go to
Step 6
|
5
| Repair the open in CKT 72
(LT BLU).
Refer to
Wiring Repairs
.
Is the repair complete?
| --
| Go to
HVAC Blower Controls System Check
| --
|
6
| Replace the heater and A/C controller.
Refer to
Control Assembly Replacement
.
Is the repair complete?
| --
| Go to
HVAC Blower Controls System Check
| --
|