GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Lighting Systems?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Test the headlamp switch battery supply circuit for an open or short to ground. Refer to Circuit Testing in Wiring Systems.

Was a condition found and corrected?

System OK

Go to Step 3

3

Test for an open in the low/high beam ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Was an open found and corrected?

System OK

Go to Step 4

4

Inspect for poor connections at the turn/headlamp switch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

System OK

Go to Step 5

5

Replace the turn/headlamp switch assembly. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column.

Is the repair complete?

System OK

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