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?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Visually inspect the 15 Amp PARKLAMP fuse for an open.

Is the fuse open?

--

Go to Step 3

Go to Step 5

3

With the headlamp switch in the off position, test the fuse output -battery circuit for a short to ground. Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

System OK

Go to Step 4

4

Test the park lamp feed circuit for a short to ground. Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

System OK

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5

Check for power in the Parklamp Fuse Output-Battery circuit at the Headlamp Switch.

Is power present?

B+

Go to Step 7

Go to Step 9

6

Check for power in the Parklamp feed circuit at the Right Hand Instrument Panel Junction Block.

Is power present?

B+

System OK

Go to Step 10

7

Check for power in the Parklamp feed circuit at the Headlamp Switch.

Is power present?

B+

Go to Step 6

Go to Step 8

8

Replace the Headlamp Switch.

Refer to

Is the repair complete?

--

System OK

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9

Repair the open or high resistance in the Parklamp Fuse Output-Battery circuit.

Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

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10

Repair the open or high resistance in the Parklamp Feed Circuit between the right hand instrument panel junction block and the headlamp switch.

Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

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