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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Wiring Systems And Power Management - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B144B: Run/Crank Power Relay >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the KR73 Ignition Main Relay turns ON and OFF when commanding the Run/Crank relay On and Off with a scan tool.
    • If the KR73 Ignition Main Relay does not turn ON and OFF 

      Refer to Circuit/System Testing.

    • If the KR73 Ignition Main Relay turns ON and OFF 
  3. All OK.
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