GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

SCHEMATIC REFERENCE: Interior Lights Schematics

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 ON position.
  2. Open the vanity mirror.
  3. Position 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 inoperative 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 feed circuit of the inoperative vanity mirror lamp bulb and the ground circuit of the inoperative vanity mirror lamp bulb.

Does the test lamp illuminate?

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Go to Step 4

Go to Step 7

4

Inspect for poor connections at the inoperative bulb connector 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 8

Go to Step 5

5

Replace the inoperative vanity mirror lamp bulb(s). Refer to Vanity Mirror Lamp Replacement .

Did you complete the replacement?

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Go to Step 8

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6

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

Did you complete the repair?

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Go to Step 8

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7

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

Did you complete the repair?

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Go to Step 8

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8

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