GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Express 🢒 Body and Accessories 🢒 Doors 🢒 Power Door Locks Inoperative - One Motor

Step

Action

Value(s)

Yes

No

1

Was the Power Door Locks System Check performed?

--

Go to Step 2

Go to Power Door Locks System Check

2

Does the left front power door lock operate?

--

Go to Step 5

Go to Step 3

3
  1. Disconnect the left front door lock actuator motor connector.
  2. Connect an 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 4

Go to Step 27

4
  1. Connect an unpowered test lamp between the left 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 28

Go to Step 29

5

Does the right front power door lock operate?

--

Go to Step 8

Go to Step 6

6
  1. Disconnect the right front door lock actuator motor connector.
  2. Connect an unpowered test lamp between the right 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 7

Go to Step 30

7
  1. Connect an 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 28

Go to Step 31

8

Is vehicle equipped with upfitter provisions?

--

Go to Step 18

Go to Step 9

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 unpowered test lamp between the side door lock actuator connector, cavity A 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 a J 39200 between the side door lock actuator motor connector, cavity A for CKT 294 (TAN), and the side door contact switch, pin A.

Does the circuit have continuity?

--

Go to Step 32

Go to Step 12

12
  1. Open side door.
  2. Connect a J 39200 between the side door lock actuator motor connector, cavity A, for CKT 294 (TAN), and the side door contact plunger A.

Does the circuit have continuity?

--

Go to Step 33

Go to Step 34

13
  1. Connect an unpowered test lamp between the side 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 35

Go to Step 14

14
  1. Close the side door.
  2. Disconnect the side door contact connector.
  3. Connect a J 39200 between the side door lock actuator motor connector, cavity B for CKT 295 (GRY), and the side door contact switch, pin B.

Does the circuit have continuity?

--

Go to Step 36

Go to Step 15

15
  1. Open side door.
  2. Connect a J 39200 between the side door lock actuator motor connector, cavity B, for CKT 295 (GRY), and the side door contact plunger B.

Does the circuit have continuity?

--

Go to Step 33

Go to Step 34

16
  1. Disconnect the rear door lock actuator motor connector.
  2. Connect an unpowered test lamp between the rear door lock actuator 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 37

17
  1. Connect an 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 38

Go to Step 39

18

Does the side power door lock operate?

--

Go to Step 25

Go to Step 19

19
  1. Disconnect the side door lock actuator motor connector.
  2. Close the side door.
  3. Connect an unpowered test lamp between the side door lock actuator connector, cavity A 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 22

Go to Step 20

20
  1. Disconnect the side door contact connector.
  2. Connect a J 39200 between the side door lock actuator motor connector, cavity A for CKT 294 (TAN), and the side door contact switch, pin A.

Does the circuit have continuity?

--

Go to Step 40

Go to Step 21

21
  1. Open side door.
  2. Connect a J 39200 between the side door lock actuator motor connector, cavity A, for CKT 294 (TAN), and the side door contact plunger A.

Does the circuit have continuity?

--

Go to Step 33

Go to Step 34

22
  1. Connect an unpowered test lamp between the side 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 35

Go to Step 23

23
  1. Close the side door.
  2. Disconnect the side door contact connector.
  3. Connect a J 39200 between the side door lock actuator motor connector, cavity B for CKT 295 (GRY), and the side door contact switch, pin B.

Does the circuit have continuity?

--

Go to Step 41

Go to Step 24

24
  1. Open side door.
  2. Connect aJ 39200 between the side door lock actuator motor connector, cavity B, for CKT 295 (GRY), and the side door contact plunger B.

Does the circuit have continuity?

--

Go to Step 33

Go to Step 34

25
  1. Disconnect the rear door lock actuator motor connector.
  2. Connect an unpowered test lamp between the rear door lock actuator 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 26

Go to Step 42

26
  1. Connect an 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 38

Go to Step 43

27

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

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

28

Replace the front door power lock actuator.

Refer to Front Side Door Lock Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

29

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

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

30

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

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

31

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

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

32

Repair open in CKT 294 (TAN) between the side door contact connector and splice S314.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

33

Replace side door contact, located on door jamb.

Refer to Sliding Door Jamb Contact Plate Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

34

Replace side door power lock wiring harness

Refer to Door Wiring Harness Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

35

Replace the side door power lock actuator.

Refer to Front Side Door Lock Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

36

Repair open in CKT 295 (GRY) between the side door contact connector and splice S315.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

37

Repair open in CKT 294 (TAN) between the rear door lock actuator connector and splice S314.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

38

Replace the rear door power lock actuator.

Refer to Rear Door Lock Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

39

Repair open in CKT 295 (GRY) between the rear door lock actuator connector and splice S315.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

40

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

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

41

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

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

42

Repair open in CKT 294 (TAN) between the rear door lock actuator connector and splice S314 or splice S243 for vehicle with upfitter provisions.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--

43

Repair open in CKT 295 (GRY) between the rear door lock actuator connector and splice S315 or splice S244 for vehicle with upfitter provisions.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

--