GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle In Vehicle DTC Information

2

Place the inside rear view mirror lamp switch in the ON position.

Does the inside rear view mirror lamp operate properly?

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

Go to Step 3

3

Does the courtesy lamp function of the inoperative inside rear view mirror lamp operate properly?

Go to Step 4

Go to Courtesy Lamps Inoperative

4

  1. Disconnect the inside rear view mirror switch.
  2. Probe the ground circuit of the inside rear view mirror lamp switch with a test lamp that is connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 6

Go to Step 5

5

Repair an open or high resistance in the ground circuit of the inside rear view mirror lamp switches. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you correct the condition?

Go to Step 7

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6

Replace the inside rear view mirror. Refer to Inside Rearview Mirror Replacement in Stationary Windows.

Did you complete the replacement?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2