GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the left front power window switch.
  2. Turn the ignition switch to the ON position.
  3. Connect a test lamp between terminal G of left front power window switch (connector C1 Sedan) and ground.

Does the test lamp light?

--

Go to Step 2

Go to Step 3

2

Connect a test lamp between terminal B and terminal G of left front power window switch (connector C1 Sedan).

Does the test lamp light?

--

Go to Step 4

Go to Step 5

3

Use a test lamp in order to backprobe the right IP wiring harness junction block between terminal A8 of connector C3 and ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 7

4

Replace the left front power window switch.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

5

Repair the open in CKT 550 between the left front power window switch and ground splice pack G301. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

6

Repair the open in CKT 141 between the right IP wiring harness junction block and the left front power window switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

7

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

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--