GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Remove relay 16.

Are the fog lamps lit?

--

Go to Step 2

Go to Step 3

2

Repair a short to B+ in circuit 34.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

--

3

Replace the relay 16 with a known good relay.

Are the fog lamps lit?

--

Go to Step 4

Go to Diagnostic System Check - Lighting Systems

4

Inspect for a short to B+ in circuit 317.

Is there a short in the circuit 317?

--

Go to Step 5

Go to Step 6

5

Repair a short to B+ in circuit 317.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

--

6

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

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

--