GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Visually inspect the 10 Amp FOG LPS fuse for an open.

Is fuse open?

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Go to Step 3

Go to Step 5

3

Test the fuse output-battery circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

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System OK

Go to Step 4

4

Test the fog lamp feed circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

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System OK

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5

With the headlamps and the fog lamp switch in the ON position, test the fuse output-battery circuit and the Fog Lamp Switch Output circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

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System OK

Go to Step 6

6

Test the fog lamp feed circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

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System OK

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