7 Round Pin Tractor Trailer Circuit Tester


Features and Benefits:

  • Troubleshoots tractor trailer circuits
  • One person can now test all the lighting
  • Allows bypassing of troubled circuitry while on the road
  • Eliminates guesswork
  • Packaged with an extra jumper connector
  • The 7 round pin trailer tester identifies faulty circuit on trucks and trailers by attaching to the wire terminals Plugs in line to the trailer to allow the truck to power the trailer while you test each circuit. Also has an emergency bypass feature which allows the user to remove the pin on the faulty circuit and jump power from the 12 volt supply for a temporary fix.

    Repair only up to 1 yr

    WARNING: This product can expose you to chemicals, including Lead and lead compounds, known to the state of California to cause cancer or birth defects or other reproductive harm. For more information, vist –

Additional information

Weight0.55 lbs
Dimensions8.75 × 4 × 2 cm


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