GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Open the right hand (RH) vanity mirror.

Does the RH vanity mirror lamp illuminate?

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

Go to Step 3

3

Do the courtesy lamps operate properly?

Go to Step 4

Go to Courtesy Lamps Inoperative

4

  1. Disconnect the RH vanity mirror lamp.
  2. Probe the courtesy lamps supply voltage circuit of the RH vanity mirror lamp with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

5

Connect a test lamp between the courtesy lamps supply voltage circuit and the ground circuit of the RH vanity mirror lamp.

Does the test lamp illuminate?

Go to Step 6

Go to Step 8

6

Inspect for poor connections at the harness connector of the RH 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?

Go to Step 10

Go to Step 9

7

Repair an open or high resistance in the courtesy lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

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8

Repair an open or high resistance in the ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

--

9

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

Did you complete the replacement?

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3