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 LR 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 LR side window switch connector.
  2. Turn the ignition switch to the RUN position.
  3. Connect a digital multimeter (DMM) to CKT 168 (DK GRN), terminal A and CKT 169 (PPL), terminal D at the LR side window switch connector.
  4. Operate the LR window from the LH door lock and side window switch in the UP/DOWN position.
  5. Test for voltage. Refer to Circuit Testing in wiring systems.

Is battery voltage present in both directions?

B+

Go to Step 4

Go to Step 5

4

  1. Reconnect the LR side window switch connector.
  2. Disconnect the LR side window regulator motor connector.
  3. Turn the ignition switch to the RUN position.
  4. Connect a digital multimeter (DMM) to CKT 668 (DK BLU), terminal B and CKT 669 (BRN), terminal A at the LR side window regulator motor connector.
  5. Operate the LR window from the LH door lock and side window switch in the UP/DOWN position.
  6. Test for voltage. Refer to Circuit Testing in wiring systems.

Is battery voltage present in both directions?

B+

Go to Step 10

Go to Step 6

5

Test CKT'S 168 (DK GRN), and 169 (PPL) for an open. Refer to Circuit Testing in wiring systems.

Was an open present?

--

Go to Step 7

Go to Step 8

6

Test CKT'S 668 (DK BLU), and 669 (BRN) for an open. Refer to Circuit Testing in wiring systems.

Was an open present?

--

Go to Step 7

Go to Step 9

7

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 11

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8

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

Is the repair complete?

--

Go to Step 11

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9

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

Is the repair complete?

--

Go to Step 11

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10

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

Is the repair complete?

--

Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3