Features and Benefits:

Troubleshoots tractor trailer circuits
One person can test all the lighting alone
Allows you to bypass troubled circuits while on the road
Eliminates guesswork
Comes 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. Tests Truck side trailering circuits and Trailer Side Trailering circuits. Emergency bypass feature allows driver to safely return to show for repairs. Made from Durable ABS Plastic. 1 Year Limited Warranty.