GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire power windows system check performed?

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Go to Step 2

Go to Power Windows System Check

2

  1. Place the ignition switch into the RUN position.
  2. Disconnect the LF window regulator motor connector.
  3. Using a test light, backprobe the LF window regulator motor connector from terminal A to terminal B.
  4. Press the LF window switch UP and then DOWN.

Does the test light illuminate after both actions?

--

Go to Step 3

Go to Step 4

3

Replace the LF window regulator motor. Refer to Front Side Door Window Regulator Replacement .

Is the repair complete?

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Go to Step 7

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4

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the LF window switch.
  3. Using a DMM, check CKT 164 and 165 for continuity, and a short to ground.

Are any of these conditions present?

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Go to Step 5

Go to Step 6

5

Repair the open, or short to ground in CKT 164 or 165.

Is the repair complete?

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Go to Step 7

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6

Replace the LF window switch. Refer to Door Trim Plate Replacement .

Is the repair complete?

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Go to Step 7

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7

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

Have all the repairs been made?

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Go to Power Windows System Check

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