GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Interior Lights System Check?

--

Go to Step 2

Go to Interior Lamps System Check

2

Disconnect the diode module.

Does the dome lamp light?

--

Go to Step 3

Go to Step 4

3

Does the vehicle have 4 doors?

--

Go to Step 8

Go to Step 10

4

  1. Disconnect the switch connector from the left front door jamb.
  2. Close the left front door.
  3. Connect a test lamp from the left front door jamb switch connector terminal (BLK wire) to B+.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Replace the left front door jamb switch. Refer to Front Side Door Jamb Switch Replacement .

Is the repair complete?

--

Go to Interior Lamps System Check

--

6

Inspect for a short to ground in the BLK/BLU wire between the following components:

    • The left front door jamb switch
    • The audio alarm module
    • The diode module

Is the connection OK?

--

Go to Step 7

Go to Step 12

7

Replace the audio alarm module. Refer to Audio Alarm Module Replacement in IP Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

--

8

Inspect for a short to ground in the BLK/RED wire between the following components:

    • The dome lamp
    • The diode module
    • The right front door jamb switch connector
    • The left rear door jamb switch connector
    • The right rear door jamb switch connector

Is the connection OK?

--

Go to Step 9

Go to Step 12

9

Replace the dome lamp. Refer to Dome Lamp Replacement .

Is the repair complete?

--

Go to Interior Lamps System Check

--

10

Inspect for a short to ground in the BLK/RED wire between the following components:

    • The dome lamp
    • The diode module
    • The right front door jamb switch connector

Is the connection OK?

--

Go to Step 11

Go to Step 12

11

Replace the dome lamp. Refer to Dome Lamp Replacement .

Is the repair complete?

--

Go to Interior Lamps System Check

--

12

Repair the short to ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

--