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

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Verify that the fog lamp indicator is inoperative.

Does the fog lamp indicator operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Do the fog lamps operate normally?

Go to Step 4

Go to Symptoms - Lighting Systems

4

Test the fog lamp supply voltage circuit for an open or high resistance. Refer to Circuit Testing in Wiring Systems.

Was a problem found?

Go to Step 5

Go to Step 6

5

Repair the open or high resistance in the fog lamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 7

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6

Replace the fog lamp switch. Refer to Headlamp Switch Replacement .

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 3