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Home >> Buick >> 2018 >> Enclave Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Power Windows Malfunction (Without Express Up/Down Windows) >> Component Testing

Component Testing

  1. Ignition/Vehicle - Off
  2. Disconnect the appropriate electrical connector: M74 Window Motor
  3. Connect a 25 A fused jumper wire between the test points: Control terminal 1 & B+
  4. Momentarily connect a jumper wire between the test points: Control terminal 2 & Ground

    Reverse the jumper wires 2 times between the terminals.

    Verify the component works as specified: M74 Window Motor = Up & Down

    • If not the specified state 

      Replace the component: M74 Window Motor

    • Go to next step: If the specified state 
  5. All OK.
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