GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the power door locks circuit description and operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

Verify the fault is present.

Does the system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Does the left front power door lock operate?

--

Go to Step 6

Go to Step 4

4

  1. Disconnect the left front door lock actuator motor connector.
  2. Connect an J 35616-200 unpowered test lamp between the left front door actuator motor connector, cavity A for CKT 294 (TAN), and ground.
  3. Depress any power door lock switch to perform the unlock operation.

Does the test lamp light?

--

Go to Step 5

Go to Step 18

5

  1. Connect an J 35616-200 unpowered test lamp between the left front door lock actuator motor connector, cavity B for CKT 295 (GRY), and ground.
  2. Depress any power door lock switch to perform the lock operation.

Does the test lamp light?

--

Go to Step 19

Go to Step 20

6

Does the right front power door lock operate?

--

Go to Step 9

Go to Step 7

7

  1. Disconnect the right front door lock actuator motor connector.
  2. Connect an J 35616-200 unpowered test lamp between the right front door lock actuator motor connector, cavity A for CKT 294 (TAN), and ground.
  3. Depress any power door lock switch to perform the unlock operation.

Does the test lamp light?

--

Go to Step 8

Go to Step 21

8

  1. Connect an J 35616-200 unpowered test lamp between the right front door actuator motor connector, cavity B for CKT 295 (GRY), and ground.
  2. Depress any power door lock switch to perform the lock operation.

Does the test lamp light?

--

Go to Step 19

Go to Step 22

9

Does the side power door lock operate?

--

Go to Step 16

Go to Step 10

10

  1. Disconnect the side door lock actuator motor connector.
  2. Close the side door.
  3. Connect an J 35616-200 unpowered test lamp between the side door lock actuator connector, cavity B for CKT 294 (TAN), and ground.
  4. Depress any power door unlock switch to perform the unlock operation.

Does the test lamp light?

--

Go to Step 13

Go to Step 11

11

  1. Disconnect the side door contact connector.
  2. Connect an J 39200 digital multimeter between the side door lock actuator motor connector, cavity B for CKT 294 (TAN), and the side door contact, pin A.

Does the circuit have continuity?

--

Go to Step 23

Go to Step 12

12

  1. Open the side door.
  2. Connect an J 39200 digital multimeter between the side door lock actuator motor connector, cavity B, for CKT 294 (TAN), and the side door contact plunger terminal A.

Does the circuit have continuity?

--

Go to Step 24

Go to Step 25

13

  1. Connect an J 35616-200 unpowered test lamp between the side door lock actuator motor connector, cavity A for CKT 295 (GRY), and ground.
  2. Depress any power door lock switch to perform the lock operation.

Does the test lamp light?

--

Go to Step 26

Go to Step 14

14

  1. Close the side door.
  2. Disconnect the side door contact connector.
  3. Connect an J 39200 digital multimeter between the side door lock actuator motor connector, cavity A for CKT 295 (GRY), and the side door contact, pin B.

Does the circuit have continuity?

--

Go to Step 30

Go to Step 15

15

  1. Open the side door.
  2. Connect an J 39200 digital multimeter between the side door lock actuator motor connector, cavity A, for CKT 295 (GRY), and the side door contact plunger terminal B.

Does the circuit have continuity?

--

Go to Step 24

Go to Step 25

16

  1. Disconnect the rear door lock actuator motor connector.
  2. Connect an J 35616-200 unpowered test lamp between the rear door lock actuator motor connector, cavity A for CKT 294 (TAN), and ground.
  3. Depress any power door lock switch to perform the unlock operation.

Does the test lamp light?

--

Go to Step 17

Go to Step 28

17

  1. Connect an J 35616-200 unpowered test lamp between the rear door actuator motor connector, cavity B for CKT 295 (GRY), and ground.
  2. Depress any power door lock switch to perform the lock operation.

Does the test lamp light?

--

Go to Step 28

Go to Step 29

18

Repair open in CKT 294 (TAN) between the left front door lock actuator motor connector and splice S243.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

19

Replace the power door front lock actuator.

Refer to Front Side Door Lock Replacement .

Is the repair complete?

--

Go to Step 31

--

20

Repair open in CKT 295 (GRY) between the left front door lock actuator motor connector and splice S244.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

21

Repair open in CKT 294 (TAN) between the right front door lock actuator motor connector and splice S243.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

22

Repair open in CKT 295 (GRY) between the right front door lock actuator motor connector and splice S244.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

23

Repair open in CKT 294 (TAN) between the side door contact connector and splice S243.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

24

Replace the side door contact, located on the door jamb.

Refer to Sliding Door Jamb Contact Plate Replacement .

Is the repair complete?

--

Go to Step 31

--

25

Replace side door power lock wiring harness.

Refer to Door Wiring Harness Replacement .

Is the repair complete?

--

Go to Step 31

--

26

Replace the side door power lock actuator motor.

Refer to Front Side Door Lock Replacement .

Is the repair complete?

--

Go to Step 31

--

27

Repair open in CKT 294 (TAN) between the rear door lock actuator connector and splice S243.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

28

Replace the rear door power lock actuator motor.

Refer to Rear Door Lock Replacement .

Is the repair complete?

--

Go to Step 31

--

29

Repair open in CKT 295 (GRY) between the rear door lock actuator connector and splice S244.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

30

Repair open in CKT 295 (GRY) between the side door contact connector and splice S244.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 31

--

31

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3