GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Engine Cooling Schematics

Connector End View Reference: Cooling System Connector End Views

DEFINITION: The engine cooling fan motor runs continuously.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Turn ON the ignition, with the engine OFF.

Is the engine cooling fan running all the time?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3

Remove the cooling fan relay.

Did the cooling fan turn OFF?

Go to Step 5

Go to Step 4

4

Repair the short to B+ in the cooling fan motor supply voltage circuit. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 7

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5

Inspect for poor connections at the cooling fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 7

Go to Step 6

6

Replace the cooling fan relay.

Did you complete the repair?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2