GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Automatic Door Locks System Check performed?

--

Go to Step 2

Go to Power Door Locks System Check

2

  1. Turn the ignition switch to the LOCK position.
  2. Connect a test light between the following door lock switch terminals:
  3. • The driver's side door lock switch, terminals C and B+
    • The passengers side door lock switch, terminals B and B+
  4. Press the lock on the inoperative door lock switch while observing the test light.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

3

Repair a poor connection or an open in circuit 780.

Is the repair complete?

--

Go to Step 5

--

4

Repair the door lock switch.

Is the repair complete?

--

Go to Step 5

--

5

  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connectors.
  3. Reinstall the components that were removed.

Have all repair been made?

--

Go to Power Door Locks System Check

--