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For 1990-2009 cars only

Power Door Locks Inoperative 4 Door Utility/Suburban

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic should only be used if all door lock motors are inoperative from all switches.

1

Has the Power Door Locks System Check been performed?

--

Go to Step 2

Go to Power Door Locks System Check

2

Connect a J 35616-200 test lamp between CKT 640 (ORN) at LF door lock switch and ground.

Does test lamp light?

--

Go to Step 3

Go to Step 14

3

  1. Gain access to the Door Lock Relay.
  2. Connect a J 35616-200 test lamp between CKT 540 (ORN) and ground.

Does test lamp light?

--

Go to Step 4

Go to Step 15

4

Connect a J 39200 DMM, set on Ohms, between CKT 150 (BLK) at Door Lock Relay and ground.

Is there continuity?

--

Go to Step 5

Go to Step 16

5

  1. Connect a J 35616-200 test lamp between CKT 294 (TAN) at Door Lock Relay and ground.
  2. Move LF Door Lock Switch to the UNLOCK position.

Does test lamp light?

--

Go to Step 6

Go to Step 9

6

  1. Connect a J 35616-200 test lamp between CKT 295 (GRY) and ground.
  2. Move LF Door Lock Switch to the LOCK position.

Does the test lamp light?

--

Go to Step 7

Go to Step 10

7

Connect a J 39200 DMM, set on Ohms, between CKT 295 (GRY) at Door Lock Relay and ground and CKT 294 (TAN) and ground.

Is there continuity in both positions?

--

Go to Step 8

Go to Step 13

8

Repair open in CKT 294 (TAN) or CKT 295 (GRY) between Door Lock Relay and door lock motors. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

 

--

9

  1. Connect a J 35616-200 test lamp between CKT 194 (WHT) and ground.
  2. Move LF Door Lock Switch to the UNLOCK position.

Does the test lamp light?

--

Go to Step 11

Go to Step 12

10

  1. Connect a J 35616-200 test lamp between CKT 195 (LT BLU) and ground.
  2. Move the LF Door Lock Switch to the lock position.

Does the test lamp light?

--

Go to Step 11

Go to Step 13

11

Replace the Door Lock Relay.

Is the repair complete?

--

Go to Power Door Locks System Check

--

12

Repair open in CKT 194 (WHT) between Door Lock Switches and Door Lock Relay. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

13

Repair open in CKT 195 (LT BLU) between Door Lock Switches and Door Lock Relay. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

14

Repair open in CKT 640 (ORN) between I/P Fuse Block and Door Lock Switches. Refer to Wiring Repairs in Wiring Systems.

Do the door locks function properly?

--

Go to Power Door Locks System Check

Go to Step 3

15

Repair open in CKT 540 (ORN) between I/P Fuse Block and Door Lock Relay. Refer to Wiring Repairs in Wiring Systems.

Do the door locks function properly?

--

Go to Power Door Locks System Check

Go to Step 4

16

Repair open in CKT 150 (BLK) between Door Lock Relay and G202. Refer to Wiring Repairs in Wiring Systems.

Do the door locks function properly?

--

Go to Power Door Locks System Check

Go to Step 5

Power Door Locks Inoperative Pickup/2 Door Utility

Step

Action

Values

Yes

No

DEFINITION: This diaqgnostic should only be used if all door lock motors are inoperative from all switches.

1

Has the Power Door Locks System Check been performed?

--

Go to Step 2

Go to Power Door Locks System Check

2

  1. Access LF door lock switch.
  2. Connect a J 35616-200 test lamp from CKT 540 (ORN) from the left power door lock switch connector to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

Connect a J 35616-200 test lamp between CKT 150 (BLK) at cavities B and A the left power door lock switch connector to B+.

Does the test lamp light at both places?

--

Go to Step 5

Go to Step 20

4

Repair the open in CKT 540 (ORN) between splice S255 and the convenience center, or from the convenience center to the fuse block. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

5

  1. Access RF door lock switch.
  2. Connect a J 35616-200 test lamp between CKT 294 (TAN) and B+.

Does test lamp light?

--

Go to Step 6

Go to Step 10

6

Connect a J 35616-200 test lamp between CKT 295 (GRY) and B+.

Does the test lamp light?

--

Go to Step 7

Go to Step 13

7

  1. Connect a J 35616-200 test lamp from CKT 294 (TAN) at RF door lock switch to ground.
  2. Move LF door lock switch to the UNLOCK position.

Does the test lamp light?

--

Go to Step 8

Go to Step 16

8

  1. Connect a J 35616-200 test lamp from CKT 295 (GRY) at RF door lock switch to ground.
  2. Move LF door lock switch to the LOCK position.

Does the test lamp light?

--

Go to Step 9

Go to Step 19

9

  1. Repair open(s) in CKT 294 (TAN) and/or CKT 295 (GRY) between RF door lock switch and door lock motors. Refer to Wiring Repairs in Wiring Systems.
  2. If no open(s) are found replace both door lock motors.

Is the repair complete?

--

Go to Power Door Locks System Check

--

10

Connect a J 35616-200 test lamp between CKT 194 (WHT) at RF door lock switch and B+.

Does test lamp light?

--

Go to Step 11

Go to Step 12

11

Replace RF door lock switch. Refer to Door Lock Switch Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

12

  1. Check for an open in CKT 194 (WHT) between RF and LF door lock switches, repair as necessary. Refer to Wiring Repairs in Wiring Systems.
  2. If no open is found, replace LF door lock switch. Refer to Power Accessory Switch Panel Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

13

Connect a J 35616-200 test lamp between CKT 195 (LT BLU) at RF door lock switch and B+.

Does test lamp light?

--

Go to Step 14

Go to Step 15

14

Replace RF door lock switch. Refer to Door Lock Switch Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

15

  1. Check for an open in CKT 195 (LT BLU) between RF and LF door lock switches, replace as necessary. Refer to Wiring Repairs in Wiring Systems.
  2. If no open is found, replace LF door lock switch.

Is the repair complete?

--

Go to Power Door Locks System Check

--

16

  1. Connect a J 35616-200 test lamp between CKT 194 (WHT) at RF door lock switch and ground.
  2. Move the LF door lock switch to the UNLOCK position.

Does the test lamp light?

--

Go to Step 17

Go to Step 18

17

Replace the RF door lock switch. Refer to Door Lock Switch Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

18

Replace the LF door lock switch. Refer to Power Accessory Switch Panel Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

19

  1. Connect a J 35616-200 test lamp between CKT 195 (LT BLU) at RF door lock switch and ground.
  2. Move the LF door lock switch to the LOCK position.

Does the test lamp light?

--

Go to Step 17

Go to Step 18

20

Repair an open in CKT 150 (BLK) between LF Power Door Lock Switch and G202. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--