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?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Inspect the appropriate park lamp fuse in the rear fuse block for an open.

Is the fuse open?

--

Go to Step 3

Go to Step 5

3

Repair short to ground in the appropriate park lamp circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 4

--

4

Replace the park lamp fuse. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 8

--

5

  1. Turn the headlamp switch to the PARK position.
  2. Connect a test lamp from the park lamp output circuit at the rear fuse block to ground.

Does the test lamp illuminate?

--

Go to Step 7

Go to Step 6

6

Replace the rear fuse block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Is the rear fuse block replacement complete?

--

Go to Step 8

--

7

Repair open circuit in the appropriate park lamp circuit between the rear fuse block and the park lamp.

Is the repair complete?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you find and correct the condition?

--

System OK

Go to Step 2