GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The left power window is inoperative. All other power windows operate correctly with the left front power window switch and selected door switch.

1

Did you perform the Power Windows System Check?

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Go to Step 2

Go to Power Windows System Check

2

  1. Connect a scan tool.
  2. Select DATA from driver door module (DDM) data list.
  3. Operate the left front power window switch to the UP and the DOWN positions.

Does the scan tool indicate that the switch is operating properly?

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Go to Step 4

Go to Step 3

3

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

Did you complete the repair?

--

Go to Power Windows System Check

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4

  1. Disconnect the left front power window motor at the motor.
  2. Measure the voltage between the motor terminal A and terminal B while pressing the switch to the UP and the DOWN positions.

Does the voltage measure within the specified range in both the UP and the DOWN positions?

10-15 V

Go to Step 5

Go to Step 6

5

Replace the left front power window motor. Refer to Power Window Motor Replacement

Did you complete the repair?

--

Go to Power Windows System Check

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6

  1. Disconnect the driver door module (DDM) connector C2.
  2. Measure the resistance between the power window motor harness connector terminal A and the door module harness connector C2 terminal B.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 8

Go to Step 7

7

Repair an open in CKT 165. Refer to Wiring Repairs

Did you complete the repair?

--

Go to Power Windows System Check

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8

Measure the resistance between the power window motor harness connector terminal B and the door module harness connector C2 terminal C.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 10

Go to Step 9

9

Repair an open in CKT 164. Refer to Wiring Repairs

Did you complete the repair?

--

Go to Power Windows System Check

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10

Replace the DDM. Refer to Front Door Module Replacement

Did you complete the repair?

--

Go to Power Windows System Check

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