GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting System Diagnostic System Check?

--

Go to Step  2

Go to Diagnostic System Check - Lighting Systems

2

Inspect for a short to B+ or ground on CKT 308.

Is there a short?

--

Go to Step 3

Go to Step 4

3

  1. Repair a short to B+ or ground on CKT 308.
  2. Inspect the system.

Did you complete the repair?

--

Go to Step 5

--

4

  1. Replace the headlamp switch. Refer to Headlamp Switch Replacement .
  2. Inspect the system.

Is the symptom still present?

--

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