GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the power window system check?

--

Go to Step 2

Go to Power Windows System Check

2

  1. Disconnect the left window regulator motor.
  2. Using a test light, probe the left window regulator motor harness connector between terminal A and terminal B.
  3. Turn the ignition switch to the RUN position.
  4. Press the left window switch to the UP, and then to the DOWN position.

Does the test light Illuminate in both cases?

--

Go to Step 16

Go to Step 3

3

  1. Disconnect the left window switch.
  2. Using a J 39200 Digital Multimeter (DMM), check circuit 165 for continuity between the left window switch harness connector C1 terminal D and the left window regulator motor harness connector terminal A.

Is there continuity in circuit 165?

--

Go to Step 4

Go to Step 5

4

Using a test light, probe between the left window switch harness connector C1 terminal D and ground.

Does the test light illuminate?

--

Go to Step 6

Go to Step 7

5

Repair a poor connection or an open in circuit 165.

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

6

Repair a short to B+ on circuit 165.

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

7

Using a test light, probe between B+ and the left window switch harness connector C1 terminal D.

Does the test light illuminate?

--

Go to Step 8

Go to Step 9

8

Repair a short to ground in circuit 165.

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

9

Using a J 39200 DMM, check circuit 164 for continuity between the left window switch harness connector C1 terminal E and the left window regulator motor harness connector terminal B.

Is there continuity in circuit 164?

--

Go to Step 11

Go to Step 10

10

Repair a poor connection or an open in circuit 164.

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

11

Using a test light, probe between the left window switch harness connector C1 terminal E and the ground.

Does the test light illuminate?

--

Go to Step 12

Go to Step 13

12

Repair a short to B+ on circuit 164.

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

13

Using a test light, probe between B+ and the LF window switch harness connector C1 terminal E.

Does the test light illuminate?

--

Go to Step 14

Go to Step 15

14

Repair a short to ground in circuit 164.

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

15

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

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--

16

Replace the left window regulator. Refer to Front Side Door Window Regulator Replacement

Has the repair been made and the system rechecked?

--

Go to Power Windows System Check

--