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Component Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

Window Motor

  1. Ignition OFF, disconnect the harness connector at the appropriate M74 Window Motor.
  2. Install a 25 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 function does not perform the UP and DOWN functions 

      Replace the M74 Window Motor.

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