GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Disconnect the headlamp and instrument panel (IP) lamp dimmer switch connector.

Do the lamps turn off?

Go to Step 3

Go to Step 4

3

Replace the headlamp and IP lamp dimmer switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

Go to Step 5

--

4

Repair a short to B+ in CKT 9.

Is the repair complete?

Go to Step 5

--

5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2