GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Fog Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Verify that the rear fog lamp indicator is inoperative.

Does the rear fog lamp indicator operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Does the rear fog lamp operate normally?

Go to Step 4

Go to Symptoms - Lighting Systems

4

Test the rear fog lamp relay control circuit to the rear fog lamp switch for an open or high resistance. Refer to Circuit Testing or Wiring Repairs.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the rear fog lamp switch. Refer to Rear Fog Lamp Switch Replacement .

Did you complete the replacement?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3