GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

The inside rearview mirror reading lamps do not turn on when the inside rearview mirror reading lamps switches are on.

1

Was the Interior Lights System Check performed?

--

Go to Step 2

Refer to Interior Lamps System Check

2

Was the BCM Diagnostic System Check performed?

--

Go to Step 3

Refer to Diagnostic System Check - Body Control System

3

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

Is any bulb filament open?

--

Go to Step 4

Go to Step 5

4

Replace the inside rearview mirror lamps bulbs.

Has the repair been made?

--

Go to Step 10

--

5

  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 C (terminal 7 if equipped with auto day-night mirror)
    • Ground

Does the test light illuminate?

--

Go to Step 6

Go to Step 7

6

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

    • The inside rearview mirror reading lamps harness connector terminal B (terminal 2 if equipped with auto day-night mirror)
    • The inside rearview mirror reading lamps harness connector terminal C (terminal 7 if equipped with auto day-night mirror).

Does the test light illuminate?

--

Go to Step 8

Go to Step 9

7

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

Has the repair been made?

--

Go to Step 10

--

8

Replace the inside rearview mirror reading lamps assembly.

Has the repair been made?

--

Go to Step 10

--

9

Repair a poor connection or an open in circuit 850.

Has the repair been made?

 

Go to Step 10

--

10

  1. Turn the ignition switch to the LOCK position.
  2. Reinstall any removed connectors or components.

Have all the repairs been made?

--

Refer to Interior Lamps System Check

--