GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

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

Go to Step 3

3

Connect a test lamp from the inadvertent power courtesy lamps supply voltage circuit above the headliner at the inoperative visor vanity mirror connector to ground. Refer to Circuit Testing .

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4

Connect a test lamp between the inadvertent power courtesy lamps supply voltage circuit and the ground circuit at the inoperative visor vanity mirror lamp connector. Refer to Circuit Testing .

Does the test lamp illuminate?

Go to Step 7

Go to Step 6

5

Repair the open, high resistance or short to ground in the inadvertent power courtesy lamps supply voltage circuit. Refer to Wiring Repairs .

Is the repair complete?

Go to Step 8

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6

Repair the open or high resistance in the ground circuit. Refer to Wiring Repairs .

Is the repair complete?

Go to Step 8

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7

  1. Inspect the inoperative visor mirror bulb for an open filament and replace as necessary.
  2. If the bulb is good, replace the sunshade. Refer to Sunshade Replacement .

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