GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: The inside rearview mirror reading lamps do not turn ON when the inside rearview mirror reading lamps switches are ON.

1

Did you perform the Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Inspect the filament of the inside rearview mirror reading lamps bulbs.

Is any bulb filament open?

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Go to Step 3

Go to Step 4

3

Replace the inside rearview mirror lamps bulbs.

Is the repair complete?

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Go to Step 9

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4

  1. Disconnect the inside rearview mirror reading lamps electrical connector.
  2. Turn the ignition switch from the LOCK position to the RUN position.
  3. Turn the IP dimmer switch to the DOME position.
  4. Use a test light in order to connect between following components:
  5. • The inside rearview mirror reading lamps harness connector terminal 7.
    • Ground

Does the test light illuminate?

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Go to Step 5

Go to Step 6

5

Use a test light in order to connect between the following components:

    • The inside rearview mirror reading lamps harness connector terminal 2.
    • The inside rearview mirror reading lamps harness connector terminal 7.

Does the test light illuminate?

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Go to Step 7

Go to Step 8

6

Repair a poor connection circuit 1732 or an open between the rearview mirror lamp and S386.

Is the repair complete?

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Go to Step 9

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7

Replace the inside rearview mirror reading lamps assembly.

Is the repair complete?

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Go to Step 9

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8

Repair a poor connection or an open in circuit 850.

Is the repair complete?

 

Go to Step 9

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9

  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

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Go to Diagnostic System Check - Lighting Systems

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