GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Was the HVAC System Check performed?

Go to Step 2

Go to HVAC System Check

2

  1. Start the engine.
  2. Turn the A/C off.

Does the air conditioning (A/C) compressor clutch engage?

Go to HVAC Compressor Clutch Does Not Disengage

Go to Step 3

3

Remove the A/C 2 relay from the relay box.

Does the A/C condenser fan motor stop?

Go to Step 4

Go to Step 5

4

Replace the A/C 2 relay. Refer to Condenser Fan Relay Replacement .

Is the repair complete?

Go to HVAC System Check

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5

Repair the short to voltage between the A/C 2 relay and the A/C condenser fan motor in the BLU/BLK wire or in the RED/BLU wire. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to HVAC System Check

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