GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the system operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Doors

2

  1. Turn the ignition to the RUN position.
  2. Attempt to operate both power windows.

Do the power windows operate normally?

--

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

Go to Step 3

3

Did you test for BCM diagnostic trouble codes?

--

Go to Step 4

Go to Diagnostic Trouble Code (DTC) Displaying

4

  1. Turn the ignition switch to the RUN position.
  2. Connect a test lamp between the ignition voltage terminal of the left side window switch connector and ground.

Does the test lamp illuminate?

--

Go to Step 7

Go to Step 5

5

Test for and repair a poor connection at C200 terminal E11. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

--

Go to Step 11

Go to Step 6

6

Repair the open in the ignition voltage circuit of the left side window switch connector. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 11

--

7

Connect a test lamp between the ignition voltage terminal of the left side window switch connector and the ground terminal of the left side window switch connector. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 10

8

Test for and repair a poor connection at the left side window switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

--

Go to Step 11

Go to Step 9

9

Replace the left side window switch. Refer to Front Side Door Window Switch Replacement .

Did you complete the replacement?

--

Go to Step 11

--

10

Repair the open in the ground circuit of the left side window switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 11

--

11

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3