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.

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

1. Turn ON the ignition, with the engine OFF.
2. Place the blower motor switch in the OFF position.

Is the blower motor OFF?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Important: The blower motor switch must remain in the OFF position during this step.

1. Turn OFF the ignition.
2. Disconnect the resistor assembly connector.
3. Turn ON the ignition, with the engine OFF.
4. Probe each control circuit with a test lamp that is connected to a good ground.

Does the test lamp illuminate while the lamp is connected to any of the blower motor control circuits?

Go to Step 4

Go to Step 5

Test the appropriate 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

Inspect for bad harness connections at 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

Inspect for bad harness connections to 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

Replace the blower motor resistor assembly. Refer to Blower Motor Resistor Assembly Replacement .

Did you complete the replacement?

Go to Step 9

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Replace the HVAC control module. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2