GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Lighting Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Remove the Park Lamp Relay.
  2. Us a digital multi meter (DMM) to test for B+ on the Park Lamp Relay Switch feed.

Is B+ present at the terminal?

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Go to Step 3

Go to Step 4

3

Install a fused jumper between the B+ feed for the park lamp relay and the switch side. Do the park lamps operate?

--

Go to Step 5

Go to Step 6

4

Repair a poor connection or an open in the park lamp relay switched B+ feed. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 5

Go to Step 6

5

Repair the park lamp relay.

Did you complete the repair?

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Go to Step 7

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6

Repair a poor connection or an open in the park lamp relay switch circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 7

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7

Recheck the system in order to verify the repair.

Was the condition corrected?

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Go to Diagnostic System Check - Lighting Systems

Go to Step 2