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?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Turn OFF the headlamp switch.

Are headlamps or park lamps on?

--

Go to the appropriate system test: Headlamps - Low Beams On with Headlamp Switch Off or High Beam On with Headlamp Switch Off or Park Lamps Always On

Go to Step 3

3

Disconnect the lights on indicator control circuit from the dash integration module (DIM).

Did the light turn off?

--

Go to Step 4

Go to Step 5

4

Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System.

Is the DIM replacement complete?

--

Go to Step 6

--

5

Repair short to ground in the lights on indicator control circuit. Refer to Wiring Repairs in Wiring Systems.

Is the wiring repair complete?

--

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you find and correct the condition?

--

System OK

Go to Step 2