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Home >> Buick >> 2013 >> Encore Base, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Power Windows Malfunction (A55, A66 Without A33) >> Component Testing

Component Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate M74 window motor.
  2. Install a 20 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M74 window motor should perform the UP and DOWN functions.
    • If the motor does not perform the UP and DOWN functions 

      Replace the M74 window motor.

    • If the motor performs the UP and DOWN functions 
  3. All OK
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