GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Fog Lights System Check performed?

--

Go to Step 2

Go to Fog Lights System Check

2

Remove the rear fog lamp relay.

Do the rear fog lamps turn off?

--

Go to Step 3

Go to Step 4

3

Disconnect the rear fog lamp switch connector.

Does the rear fog lamp turn off?

--

Go to Step 5

Go to Step 6

4

Repair the short to voltage in CKT 122 (RED) between the rear fog lamp relay and the rear fog lamp.

Is the repair complete?

--

Go to Fog Lights System Check

--

5

Replace the rear fog lamp switch.

Is the repair complete?

--

Go to Fog Lights System Check

--

6

Repair the short to ground in CKT 1977 (YEL) between the rear fog lamp relay and the rear fog lamp switch.

Is the repair complete?

--

Go to Fog Lights System Check

--