GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Lighting Diagnostic Systems Check performed?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn on the ignition.
  2. Turn the headlamp switch to the park position.

Do all of the park lamps turn on?

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Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Inspect the Front Park Lamp fuse.

Is the fuse open?

--

Go to Step 4

Go to Step 5

4

Repair a short to ground in the front park lamp B+ feed. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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5

Using a test lamp connected to a known good ground, backprobe the front park lamps B+ feed at the underhood accessory wiring junction block.

Did the test lamp illuminate?

--

Go to Step 7

Go to Step 6

6

Repair a poor connection or an open in the front park lamps B+ feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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7

Repair a open the ground circuit of the front park lamp circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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8

Operate the system in order to verify the repairs.

Did you correct the condition?

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Go to Diagnostic System Check - Lighting Systems

Go to Step 2