1. Remove the heater and A/C control unit.
2. Disconnect connector C1 from the heater and A/C control unit.
3. Remove the connector from the blower control module.
4. Test CKT FP812 (BLK/BLU) for a short to voltage. (Turn ON the ignition, leaving the engine OFF, when testing for a short to voltage.)

Did you find a short to voltage on CKT FP812?

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Go to Step 2

Go to Step 3

Repair the short to voltage on CKT FP812 (BLK/BLU).

Did you complete the repair?

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Go to Step 4

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Disconnect the blower motor ground (BRN wire) from the blower control module.

Did the blower motor stop operating?

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Go to Step 5

Go to Step 7

1. Reassemble any connectors/components removed in previous steps.
2. Turn the ignition switch to the ON position.
3. Select AUTO mode on the heater & A/C control.
4. Cycle through all the blower speeds.

Do all the blower speeds operate properly?

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System OK

Go to Step 6

Replace the blower control module.

Did you complete the replacement?

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Go to Step 4

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Replace the heater & A/C control. Refer to Control Assembly Replacement .

Did you complete the replacement?

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Go to Step 8

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Replace the blower motor. Refer to Blower Motor and Fan Replacement in HVAC.

Did you complete the replacement?

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Go to Step 8

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Operate the system for which the symptom occurred.

Is the symptom still present?

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System OK