GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Place the headlamp switch in the HEAD position.
  3. Place the headlamp dimmer switch in the HIGH BEAM position.
  4. Place the headlamp dimmer switch in the LOW BEAM position.

Do the high beam headlamps remain illuminated?

Go to Headlamp Low or High Beams Always On

Go to Step 3

3

Does the high beam indicator remain illuminated?

Go to Step 4

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

4

Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2