C1749 Code – Trailer Input Circuit Failure

What are the Possible Causes of the Code C1749?
  • Faulty Trailer Input Switch
  • Trailer Input Switch harness is open or shorted
  • Trailer Input Switch circuit poor electrical connection
  • Need help with this OBD II code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

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