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

  1. Connect a scan tool to the data link connector (DLC).
  2. Turn the ignition switch to the RUN position.
  3. Place the courtesy lamp switch in the OFF position.
  4. View the body control module (SBM) courtesy switch input.

Is the input OFF?

--

Go to Step 3

Go to Step 11

3

Inspect the SBM auxiliary lighting input.

Is the input OFF?

--

Go to Step 4

Go to Step 14

4

  1. Close all of the doors.
  2. Inspect the driver door module (DDM) dome/buzzer switch input.

Is the input OFF?

--

Go to Step 5

Go to Step 16

5

Inspect the DDM passenger dome/buzzer switch input.

Is the input OFF?

--

Go to Step 6

Go to Step 20

6

Inspect the DDM left rear dome/buzzer switch input.

Is the input OFF?

--

Go to Step 7

Go to Step 24

7

Inspect the DDM right rear dome/buzzer switch input.

Is the input OFF?

--

Go to Step 8

Go to Step 28

8

Test CKT 156 (WHT) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 156?

--

Go to Step 9

Go to Step 32

9

Test CKT 157 (GRY) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 157?

--

Go to Step 10

Go to Step 32

10

Replace the SBM. Refer to Body Control Module Replacement in Body Control Module.

Is the SBM module replacement complete?

--

Go to Interior Lamps System Check

--

11

Disconnect the headlamp switch connector.

Is the SBM courtesy switch input OFF?

--

Go to Step 12

Go to Step 13

12

Replace the headlamp switch.

Is the headlamp switch replacement complete?

--

Go to Interior Lamps System Check

--

13

Test CKT 1495 (DK BLU/WHT) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 1495?

--

Go to Step 10

Go to Step 32

14

Test CKT 1393 (DK BLU) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 1393?

--

Go to Step 15

Go to Step 32

15

Replace the remote function actuator (RFA) module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry.

Is the RFA module replacement complete?

--

Go to Interior Lamps System Check

--

16

Disconnect the left front door jamb switch connector.

Is the DDM driver dome/buzzer switch input OFF?

--

Go to Step 17

Go to Step 18

17

Replace the left front door jamb switch. Refer to Door Lock Actuator Replacement in Doors.

Is the door jamb switch replacement complete?

--

Go to Interior Lamps System Check

--

18

Test CKT 126 (TAN) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 126?

--

Go to Step 19

Go to Step 32

19

Replace the DDM. Refer to Front Side Door Window Module Replacement in Doors.

Is the DDM replacement complete?

--

Go to Interior Lamps System Check

--

20

Disconnect the right front door jamb switch connector.

Is the DDM passenger dome/buzzer switch input OFF?

--

Go to Step 21

Go to Step 22

21

Replace the right front door jamb switch. Refer to Door Lock Actuator Replacement in Doors.

Is the door jamb switch replacement complete?

--

Go to Interior Lamps System Check

--

22

Test CKT 1177 (LT GRN) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 1177?

--

Go to Step 23

Go to Step 32

23

Replace the passenger door module (PDM). Refer to Rear Side Door Window Module Replacement in Doors.

Is the PDM replacement complete?

--

Go to Interior Lamps System Check

--

24

Disconnect the left rear door jamb switch connector.

Is the DDM left rear dome/buzzer switch input OFF?

--

Go to Step 25

Go to Step 26

25

Replace the left rear door jamb switch. Refer to Door Lock Actuator Replacement in Doors.

Is the door jamb switch replacement complete?

--

Go to Interior Lamps System Check

--

26

Test CKT 1179 (DK BLU/WHT) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 1179?

--

Go to Step 27

Go to Step 32

27

Replace the rear door module (RDM). Refer to Rear Side Door Window Module Replacement in Doors.

Is the RDM replacement complete?

--

Go to Interior Lamps System Check

--

28

Disconnect the right rear door jamb switch connector.

Is the right rear dome/buzzer switch input off?

--

Go to Step 29

Go to Step 30

29

Replace the right rear door jamb switch. Refer to Door Lock Actuator Replacement in Doors.

Is the door jamb switch replacement complete?

--

Go to Interior Lamps System Check

--

30

Test CKT 1181 (YEL/BLK) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 1181?

--

Go to Step 31

Go to Step 32

31

Replace the RDM. Refer to Rear Side Door Window Module Replacement in Doors.

Is the RDM replacement complete?

--

Go to Interior Lamps System Check

--

32

Repair the faulty wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

--