GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Use a test lamp in order to backprobe the left IP junction block between terminal C5 of connector C3 and ground.

Does the test lamp light?

--

Go to Step 2

Go to Step 3

2

  1. Disconnect the left front door lock switch connector.
  2. Connect a test lamp between terminal B of the left front door lock switch connector and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

3

Replace the left IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Is the repair complete?

--

Go to Power Windows System Check

--

4

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

Is the repair complete?

--

Go to Power Windows System Check

--

5

Repair the open in CKT 1240 between the left IP junction block and the left front door lock switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Windows System Check

--