GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the HVAC System Check performed?

--

Go to Step 2

Go to HVAC System Check

2

Disconnect the A/C condenser fan relay connector.

Does the A/C condenser fan stop?

--

Go to Step 4

Go to Step 3

3

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

Is the repair complete?

--

Go to HVAC System Check

--

4

Connect a test lamp from cavity 3 of the A/C condenser fan relay connector to B+.

Does the test lamp light?

--

Go to Step 5

Go to Step 7

5

Test for a short to ground in the BLU/RED wire between the A/C condenser fan relay and the A/C compressor control module.

Does a short to ground exist?

--

Go to Step 6

Go to HVAC System Check

6

Repair the short to ground in the BLU/RED wire between the A/C condenser fan relay and the A/C compressor control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC System Check

--

7

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

Is the repair complete?

--

Go to HVAC System Check

--