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Home >> Buick >> 2013 >> Encore Base, FWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Power Windows Malfunction (A55, A66 With A33) >> Component Testing

Component Testing

Window Motor

  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

Driver Window Switch

  1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver.
  2. Test for infinite resistance between the terminals listed below with the switch in the open position:
    • Ignition terminal 13 and control terminal 12
    • Ignition terminal 13 and control terminal 14
    • Ignition terminal 6 and control terminal 2
    • Ignition terminal 6 and control terminal 3
    • Ignition terminal 6 and control terminal 4
    • Ignition terminal 6 and control terminal 5
    • If less than infinite resistance 

      Replace the S79D Window Switch-Driver.

    • If infinite resistance 
  3. Test for less than 3 Ω between the terminals listed below with the switch in the open position:
    • Ground terminal 11 and control terminal 2
    • Ground terminal 11 and control terminal 3
    • Ground terminal 11 and control terminal 4
    • Ground terminal 11 and control terminal 5
    • Ground terminal 11 and control terminal 12
    • Ground terminal 11 and control terminal 14
    • If 3 Ω or greater 

      Replace the S79D Window Switch-Driver.

    • If less than 3 Ω 
  4. Test for less than 3 Ω between the terminals listed below with the switch in the Up position.
    • Ignition terminal 13 and control terminal 14
    • Ignition terminal 6 and control terminal 3
    • Ignition terminal 6 and control terminal 5
    • If 3 Ω or greater 

      Replace the S79D Window Switch-Driver.

    • If less than 3 Ω 
  5. Test for less than 3 Ω between the terminals listed below with the switch in the Down position:
    • Ignition terminal 13 and control terminal 12
    • Ignition terminal 6 and control terminal 2
    • Ignition terminal 6 and control terminal 4
    • If 3 Ω or greater 

      Replace the S79D Window Switch-Driver.

    • If less than 3 Ω 
  6. All OK

Passenger Window Switch

  1. Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger.
  2. Test for infinite resistance between the terminals listed below with the switch in the open position:
    • Ignition terminal 5 and control terminal 1
    • Ignition terminal 5 and control terminal 4
    • If less than infinite resistance 

      Replace the S79P Window Switch-Passenger.

    • If infinite resistance 
  3. Test for less than 3 Ω between the control terminals listed below with the switch in the open position:
    • Control terminal 3 and control terminal 1
    • Control terminal 4 and control terminal 6
    • If 3 Ω or greater 

      Replace the S79P Window Switch-Passenger.

    • If less than 3 Ω 
  4. Test for less than 3 Ω between the ignition terminal 5 and the control terminal 1 with the switch in the Up position.
    • If 3 Ω or greater 

      Replace the S79P Window Switch-Passenger.

    • If less than 3 Ω 
  5. Test for less than 3 Ω between the ignition terminal 5 and the control terminal 4 with the switch in the Down position.
    • If 3 Ω or greater 

      Replace the S79P Window Switch-Passenger.

    • If less than 3 Ω 
  6. All OK

Rear Window Switch

  1. Ignition OFF, disconnect the harness connector at the appropriate S79 Window Switch-Rear.
  2. Test for infinite resistance between the terminals listed below with the switch in the open position:
    • Control terminal 5 and control terminal 1
    • Control terminal 5 and control terminal 4
    • If less than infinite resistance 

      Replace the S79 Window Switch-Rear..

    • If infinite resistance 
  3. Test for less than 3 Ω between the control terminals listed below with the switch in the open position:
    • Control terminal 3 and control terminal 1
    • Control terminal 4 and control terminal 6
    • If 3 Ω or greater 

      Replace the S79 Window Switch-Rear..

    • If less than 3 Ω 
  4. Test for less than 3 Ω between the control terminal 5 and the control terminal 1 with the switch in the Up position.
    • If 3 Ω or greater 

      Replace the S79 Window Switch-Rear..

    • If less than 3 Ω 
  5. Test for less than 3 Ω between the control terminal 5 and the control terminal 4 with the switch in the Down position.
    • If 3 Ω or greater 

      Replace the S79 Window Switch-Rear..

    • If less than 3 Ω 
  6. All OK
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