The numbers below refer to the step numbers on the diagnostic table.
This step checks for continuous operation of the blower motor.
This step tests for a short to voltage in the blower motor control circuits.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: The blower motor is ON while the blower motor switch is in the OFF position. | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
Is the blower motor OFF? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 | |
Important: The blower motor switch must remain in the OFF position during this step.
Does the test lamp illuminate while connected to any of the blower motor control circuits? | Go to Step 4 | Go to Step 5 | |
4 | Test the appropriate blower motor control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
5 | Inspect for poor connections at the harness connectors of the blower motor resistor assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
7 | Replace the blower motor resistor assembly. Refer to Blower Motor Resistor Assembly Replacement . Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the HVAC control module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |