GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Door Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Power Door Systems

2

Verify that the unlock function is inoperative, but the lock operates normally.

Do the power door locks operate normally?

--

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

Go to Step 3

3

  1. Remove the door unlock relay from the body relay block.
  2. Connect a test lamp between the door unlock relay terminal 1 and terminal 2.
  3. Push the drivers door unlock switch.

Does the test lamp light?

--

Go to Step 5

Go to Step 4

4

Repair an open in CKT 194 (WHT). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 6

--

5

Replace the door unlock relay.

Is the repair complete?

--

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3