GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Interior Lamps System Check?

--

Go to Step 2

Go to Interior Lamps System Check

2

  1. Ensure that the vehicle is equipped with an illuminated entry system.
  2. Place the dome lamp switch in the OFF position
  3. Close all of the doors.

Do the lamps turn OFF within the specified time?

40 seconds

Go to Interior Lamps System Check

Go to Step 3

3

Disconnect the headlamp and panel dimmer switch.

Do the lamps remain On without the remote control door lock receiver?

--

Go to Step 4

Go to Step 5

4

  1. Disconnect the interior lamp control module.
  2. Connect a DMMJ 39200 from CKT 157 (GRY) cavity B to the interior lamp control module connector to ground.

Is there continuity?

--

Go to Step 17

Go to Step 18

5

Do the lamps remain ON with the remote control door lock receiver?

--

Go to Step 6

Go to Step 7

6

  1. Disconnect the remote control door lock receiver.
  2. Connect a DMMJ 39200 from CKT 157 (GRY) cavity K to the remote control door lock receiver connector to ground.

Is there continuity?

--

Go to Step 13

Go to Step 14

7

Do all of the lamps turn OFF?

--

Go to Step 8

Go to Step 3

8

  1. Reconnect the headlamp and panel dimmer switch.
  2. Move the dome lamp defeat switch to the ON position.

Do the lamps remain ON?

--

Go to Step 9

Go to Step 10

9

Replace the headlamp and panel dimmer switch? Headlamp Switch Replacement

Is the replacement complete?

--

Go to Interior Lamps System Check

--

10

  1. Move the dome lamp defeat switch to the OFF position.
  2. Disconnect each door jamb switch and the liftgate strut switch one at a time.
  3. Observe if the lamps turn OFF as you disconnect each door jamb switch.

Do the lamps remain ON after all of the door jamb switches are disconnected?

--

Go to Step 12

Go to Step 11

11

Replace the affected door jamb switch. Refer to Door Jamb Switch Replacement in Doors.

Is the replacement complete?

--

Go to Interior Lamps System Check

--

12

Disconnect the door lock control module.

Do the lamps remain ON?

--

Go to Step 19

Go to Step 20

13

Repair the short to ground in CKT 157 (GRY) between the remote control door lock receiver and the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Interior Lamps System Check

--

14

Connect a DMMJ 39200 from CKT 156 (WHT) cavity S to the remote control door lock receiver connector to ground.

Is there continuity?

--

Go to Step 15

Go to Step 16

15

Repair the short to ground in CKT 156 (WHT) between the following components:

    • The remote control door lock receiver
    • The courtesy lamps
    • The dome lamp switch

Is the repair complete?

--

Go to Interior Lamps System Check

--

16

Replace the remote control door lock receiver. Refer to Receiver Replacement in Keyless Entry.

Is the replacement complete?

--

Go to Interior Lamps System Check

--

17

Repair the short to ground in CKT 157 (GRY) between the interior lamp control module and the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Interior Lamps System Check

--

18

Connect a DMMJ 39200 from CKT 156 (WHT) cavity E to the interior lamp control module connector to ground.

Is there continuity?

--

Go to Step 23

Go to Step 24

19

Repair the short to ground in CKT 328 (PPL) between the following components:

    • The headlamp and panel dimmer switch
    • The door jamb switches (except the side door)
    • The door lock control module
    • The liftgate strut switch

Is the repair complete?

--

Go to Interior Lamps System Check

--

20

Connect a Digital Multimeter from CKT 1897 (ORN/BLK) at the door lock control module connector cavity F to ground.

Is there continuity?

--

Go to Step 21

Go to Step 22

21

Repair the open in CKT 1897 (ORN/BLK) between the door lock control module and the side door jamb switch.

Is the repair complete?

--

Go to Interior Lamps System Check

--

22

Replace the door lock control module.

Is the replacement complete?

--

Go to Interior Lamps System Check

--

23

Repair the short to ground in CKT 156 (WHT) between the following components:

    • The interior lamp control module
    • The courtesy lamps
    • The dome lamp switch

Is the repair complete?

--

Go to Interior Lamps System Check

--

24

Replace the interior lamp control module. Refer to Interior Lamp Control Module Replacement .

Is the replacement complete?

--

Go to Interior Lamps System Check

--