Circuit/System Testing

2013 Buick Regal Turbo Premium, Standard TransSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the T1 Accessory DC/AC Power Inverter Module.
  2. Test for less than 10 Ξ© between the ground circuit terminal 11 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 6 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition ON, test for less than 1.0 V between the AC circuit terminals listed below and ground:
    • Terminal 2
    • Terminal 7
    • If greater than the specified range, test the AC circuit for a short to voltage.
  5. Ignition OFF, wait for 1 min. Test for infinite resistance between the AC circuit terminals listed below and ground:
    • Terminal 2
    • Terminal 7
    • If less than the specified value, test the AC circuit for a short to ground.
  6. Disconnect the harness connectors at the X81 Accessory Power Receptacle - 110 V AC.
  7. Ignition ON, verify a test lamp illuminates between the control circuit terminal 1 X1 and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  8. Verify a test lamp does not illuminate between the signal terminal 1 X2 and ground.
    • If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal replace the T1 Accessory DC/AC Power Inverter Module.
  9. Connect a 3 A fused jumper between the control terminal 1 X1 and the signal terminal 1 X2.
  10. Ignition ON, verify that a test lamp illuminates between the T1 Accessory DC/AC Power Inverter Module signal circuit terminal 12 and ground.
    • If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance.
  11. Ignition OFF, connect the harness connector at the T1 Accessory DC/AC Power Inverter Module. Ignition ON, test for 110-120 V AC between the X81 Accessory Power Receptacle - 110 V AC terminal 3 X1 and 3 X2.
    • If not within the specified range, check both AC circuits for an open/high resistance. If all circuits test normal, replace the T1 Accessory DC/AC Power Inverter Module.
  12. If all circuits test normal, replace the X81 Accessory Power Receptacle - 110 V AC.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.