GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting Systems Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Exterior Lighting Systems Description and Operation

2

Verify that the front park lamps are inoperative.

Do the park lamps operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Inspect the FR PRK fuse in the underhood fuse block.

Is the fuse open?

Go to Step 5

Go to Step 4

4

  1. Remove both of the park lamp bulbs.
  2. Inspect the bulbs/sockets for open or shorted filaments/terminals.

Does either lamp have an open or shorted filament/terminals?

Go to Step 7

Go to Step 6

5

Repair the short to ground in the front park lamps supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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6

Repair the open or high resistance in the front park lamps supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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7

Replace the defective bulb/socket.

Did you complete the repair?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3