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Circuit/System Testing

  1. Ignition OFF, verify that a test lamp illuminates between the G13 generator B+ terminal A X1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the M64 starter motor.
  2. Disconnect the X2 harness connector at the G13 generator.
  3. Ignition ON, test for 4.5-5.5 V between the control circuit terminal 1 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
    • If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  4. If all circuits test normal, replace the G13 generator.
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