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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the K67 trailer brake control module.
  2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 15 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  3. If all circuits test normal, replace the K67 trailer brake control module.
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