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 System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Place the headlamp switch in the HEAD position.
  2. Place the headlamp dimmer switch in the HIGH position.
  3. Observe the high beam indicator.

Does the high beam indicator illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Do the high beam headlamps illuminate?

Go to Step 4

Go to Headlamps Inoperative - High Beams

4

Test for a high resistance or an open in the high beam signal circuit of the instrument cluster. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Has the repair been made?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2