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Home >> Cadillac >> 2016 >> ELR >> Repair and Diagnosis (Single Page) >> Steering >> Steering Wheel And Steering Column >> Diagnostic Information and Procedures >> DTC B144C: Inverted Run/Start Power Relay Circuit >> Circuit/System Testing
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Circuit/System Testing

  1. Vehicle OFF, disconnect the KR73 RUN/CRNK relay.
  2. Vehicle in Service Mode, verify that a test lamp does not illuminate between the control circuit terminal 87A and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K60 steering column lock module.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  4. Vehicle OFF, disconnect the harness connector at the K60 steering column lock module.
  5. Connect a test lamp between the voltage circuit terminal 3 and ground.
  6. Vehicle in Service Mode, connect a 5 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87A. Verify the test lamp is illuminated.
    • If the test lamp is not illuminated and the control circuit fuse is good, test the control circuit for an open/high resistance.
    • If the test lamp is not illuminated and the control circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, replace the K60 steering column lock module.
  7. If all circuits test normal, test or replace the KR73 RUN/CRNK relay.
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