GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

1

Use a test lamp in order to backprobe the left IP wiring harness 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 wiring harness junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Is the repair complete?

--

System OK

--

4

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

Is the repair complete?

--

System OK

--

5

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

Is the repair complete?

--

System OK

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