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 RR power window is inoperative from the LF switch.

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. Access the left door lock and side window switch.
  2. Turn the ignition switch to the RUN position.
  3. Connect a digital multimeter (DMM) to CKT 170 (LT GRN), terminal H at the left door lock and window switch connector C2 and CKT 171 (PPL), terminal H at the left door lock and window switch connector C1.
  4. Operate the right rear window at the left door lock and side window switch in the UP/DOWN position.
  5. Test for voltage. Refer to Measuring Voltage in wiring systems.

Is battery voltage present?

B+

Go to Step 4

Go to Step 6

4

Inspect for a poor connection at the left door lock and side window switch.

Are the connections OK?

--

Go to Step 6

Go to Step 5

5

Repair the connections as necessary.

Is the repair complete?

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Go to Step 7

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6

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

Is the repair complete?

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Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3