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

  1. Place the interior lamp switch in the HI position.
  2. Open the vanity mirror.
  3. Place the vanity mirror lamp switch to maximum intensity.
  4. Remove the inoperative bulb from the vanity mirror lamp.
  5. Connect a test lamp between the power feed circuit of the vanity mirror lamp bulb and a good ground.

Does the test lamp illuminate?

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Go to Step 3

Go to Step 6

3

Connect a test lamp between the power feed circuit of the vanity mirror lamp and the vanity mirror lamp ground circuit.

Does the test lamp illuminate?

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Go to Step 4

Go to Step 7

4

Inspect for poor connections at the bulb of the vanity mirror lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 10

Go to Step 5

5

Replace the vanity mirror lamp bulb. Refer to Vanity Mirror Lamp Replacement .

Did you complete the replacement?

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Go to Step 10

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6

Test for high resistance or an open in the power feed circuit of the vanity mirror lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 10

Go to Step 8

7

Test for high resistance or an open in the ground circuit of the vanity mirror lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 10

Go to Step 8

8

Inspect for poor connections at the vanity mirror lamp connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 10

Go to Step 9

9

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

Did you complete the replacement?

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Go to Step 10

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10

Operate the system in order to verify the repair.

Did you find and correct the condition?

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System OK

Go to Step 2