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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock System And Release Systems >> Diagnostic Information and Procedures >> Power Door Locks Malfunction >> Component Testing

Component Testing

Driver Door Lock Switch

  1. Ignition OFF, disconnect the harness connector at the S13D Door Lock Switch-Driver.
  2. Test for infinite resistance between the signal terminal 2 and the ground terminal 4 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S13D Door Lock Switch-Driver.

    • If infinite resistance 
  3. Test for infinite resistance between the signal terminal 3 and the ground terminal 4 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S13D Door Lock Switch-Driver

    • If infinite resistance 
  4. Test for less than 2Ω between the signal terminal 2 and the ground terminal 4 with the switch in the Lock position.
    • If 2Ω or greater 

      Replace the S13D Door Lock Switch-Driver.

    • If less than 2Ω 
  5. Test for less than 2Ω between the signal terminal 3 and the ground terminal 4 with the switch in the Unlock position.
    • If 2Ω or greater 

      Replace the S13D Door Lock Switch-Driver.

    • If less than 2Ω 
  6. All OK

Passenger Door Lock Switch

  1. Ignition OFF, disconnect the harness connector at the S13P Door Lock Switch-Passenger.
  2. Test for infinite resistance between the signal terminal 2 and the ground terminal 4 with the switch in the center position.
    • If less than infinite resistance 

      Replace the S13P Door Lock Switch-Passenger.

    • If infinite resistance 
  3. Test for infinite resistance between the signal terminal 3 and the ground terminal 4 with the switch in the center position.
    • If less than infinite resistance 

      Replace the S13P Door Lock Switch-Passenger

    • If infinite resistance 
  4. Test for less than 2Ω between the signal terminal 2 and the ground terminal 4 with the switch in the Lock position.
    • If 2Ω or greater 

      Replace the S13P Door Lock Switch-Passenger.

    • If less than 2Ω 
  5. Test for less than 2Ω between the signal terminal 3 and the ground terminal 4 with the switch in the Unlock position.
    • If 2Ω or greater 

      Replace the S13P Door Lock Switch-Passenger

    • If less than 2Ω 
  6. All OK

Door Latch Test

  1. Ignition OFF, disconnect the harness connector at the appropriate A23 Door Latch Assembly.
  2. Install a 25A fused jumper wire between one of the control terminals and 12V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the A23 Door Latch Assembly should perform the LOCK and UNLOCK function.
    • If the actuator does not perform the LOCK and UNLOCK function 

      Replace the A23 Door Latch Assembly.

    • If the actuator performs the LOCK and UNLOCK function 
  3. All OK