GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Door Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Power Door Systems

2

Verify that the LF power window is inoperative.

Do the power windows operate normally?

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

Go to Step 3

3

  1. Disconnect the LH side window regulator motor.
  2. Turn the ignition switch to the RUN position.
  3. Connect a digital multimeter between terminal A and terminal B of the LH side window regulator connector.
  4. Operate the LH side window switch in the UP/DOWN positions.
  5. Test for battery voltage. Refer to Circuit Testing in wiring systems.

Is battery voltage present?

B+

Go to Step 7

Go to Step 4

4

Test CKT's 164 (DK BLU) and 165 (BRN) for an open. Refer to Circuit Testing in wiring systems.

Was an open present?

--

Go to Step 5

Go to Step 6

5

Repair the open in the appropriate circuit. Refer to Wiring Repairs in wiring systems.

Is the repair complete?

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Go to Step 8

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6

Replace the LH door lock and side window switch. Refer to Front Side Door Window Switch Replacement .

Is the repair complete?

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Go to Step 8

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7

Replace the LH side window regulator motor. Refer to Power Window Motor Replacement .

Is the repair complete?

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Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3