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

Exchange the park lamp relay with a known good relay from the underhood wiring harness junction block.

Do the park lamps turn off?

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Go to Step 3

Go to Step 4

3

Replace the faulty relay.

Is the repair complete?

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System OK

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4

Test the Park lamp feed circuirt for a short to power. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and complete the repair?

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System OK

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