GM Service Manual Online
For 1990-2009 cars only

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

Are the power door locks inoperative with the switch in both the LOCK and UNLOCK positions?

--

Go to Step 5

Go to Step 3

3

Are the power door locks inoperative with the switch in the LOCK the position only?

--

Go to Step 6

Go to Step 4

4

Are the power door locks inoperative with the switch in the UNLOCK the position only?

--

Go to Step 7

Go to Step 1

5

  1. Test for continuity between terminals 1 and 2 of the switch with the switch in the LOCK position.
  2. Test for continuity between terminals 1 and 3 of the switch with the switch in the UNLOCK position.

Does the switch test OK?

--

Go to Step 12

Go to Step 8

6

Test for continuity between terminals 1 and 2 of the switch with the switch in the LOCK position.

Does the switch test OK?

--

Go to Step 12

Go to Step 9

7

Test for continuity between terminals 1 and 3 of the switch with the switch in the UNLOCK position.

Does the switch test OK?

--

Go to Step 12

Go to Step 10

8

Test for an open in the BLK wire between the switch and S314.

Was an open found?

--

Go to Step 11

Go to Step 13

9

Test for an open in the PNK wire between the switch and the power door lock control module.

Was an open found?

--

Go to Step 11

Go to Step 13

10

Test for an open in the PNK/BLK wire between the switch and the power door lock control module.

Was an open found?

--

Go to Step 11

Go to Step 13

11

Repair the open in the wire. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

12

Replace the switch. Refer to Front Side Door Lock Replacement (front) or Rear Door Lock Replacement (rear).

Is the replacement complete?

--

Go to Power Door Locks System Check

--

13

Replace the power door lock control module.

Is the replacement complete?

--

Go to Power Door Locks System Check

--