GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

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. Disconnect the express down module connector.
  2. Place the ignition switch in the RUN position.
  3. Connect a J 39200 digital multimeter (DMM) between the express down module connector terminal A (BRN) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 3

3

Repair an open in CKT 141 (BRN). Refer to Wiring Repairs in Wiring systems.

Did you complete the repair?

--

Go to Power Windows System Check

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4

  1. Connect the DMM between the express down module connector terminal C (DK BLU) and ground.
  2. Use the left front power window switch in order to actuate the left front window UP.

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 5

5

Repair an open in CKT 164 (DK BLU). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Windows System Check

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6

  1. Close the left front power window.
  2. Inspect the window regulator counterbalance for proper winding. Refer to Power Windows Circuit Description .

Is the spring winding correctly?

--

Go to Step 8

Go to Step 7

7

Rewind the counterbalance spring. Refer to Power Windows Circuit Description .

Did you complete the repair?

--

Go to Power Windows System Check

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8

Replace the express down module.

Did you complete the repair?

--

Go to Power Windows System Check

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