GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Verify that the visor vanity mirror lamps are inoperative.

Do the visor vanity mirror lamps operate normally?

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

Go to Step 3

3

Connect a test lamp between the inadvertent power relay output circuit at the LH or the RH visor vanity mirror to a good ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 5

Go to Step 4

4

Repair the open or high resistance in the inadvertent power relay output circuit to the LH or RH vanity mirror lamp. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 8

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5

Connect a test lamp between the ground circuit at the LH or the RH visor vanity mirror lamp and the inadvertent power relay output circuit . Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 6

Go to Step 7

6

Replace the visor vanity mirror lamp. Refer to Sunshade Replacement in Interior Trim.

Did you complete the repair?

Go to Step 8

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7

Repair the open or high resistance in the vanity mirror lamp ground circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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