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 power windows are 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. Disconnect connector C1 at the LH door lock and side window switch.
  2. Turn the ignition switch to the RUN position.
  3. Connect a digital multimeter (DMM) to ground and CKT 1001 (DK GRN), terminal L at the LH door lock and side window switch connector C
  4. Test for voltage. Refer to Circuit Testing in wiring systems.

Is ignition voltage present?

B+

Go to Step 4

Go to Step 5

4

Test for an open in CKT 1850 (BLK). Refer to Circuit Testing in wiring systems.

Is an open present?

--

Go to Step 6

Go to Step 7

5

Repair the open or high resistance in CKT 1001 (DK GRN) between the power window circuit breaker and the LH door lock and side window switch. Refer to Wiring Repairs in wiring systems.

Is the repair complete?

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Go to Step 8

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6

Repair the open or high resistance in CKT 1850 (BLK) between the LH door lock and side window switch connector C2 and G202. Refer to Wiring Repairs in wiring systems.

Is the repair complete?

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Go to Step 8

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7

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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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