7 Round Pin Tractor Trailer Circuit Tester

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 connectorThe 7 round pin trailer tester identifies faulty circuit on trucks and trailers by attaching to the wire terminals ....(more info)

7 Way Flat Pin Trailer Circuit Tester

Features and Benefits: Quickly and easily test trailer circuits on most light to medium duty trucks and campers Tests vehicle circuits on 7 Flat/Spade Pin connections - quickly identifies faulty circuits Made from LEDs and ABS plastic - ensures durability 1 Year Limited WarrantyTester plugs into vehicle side wiring harness. Each....(more info)

4 and 5 Way Pin Vehicle Trailer Harness Tester

Features and Benefits: Plugs into the trailer plug Each LED light corresponds to the circuit being energized Provides an easy to connect ground terminal for trailer lighting set upTests both 4 and 5 pin vehicle side connections for faulty wiring. LEDs light up to corresponding circuit. If LED does not light up, the circuit is not receiving....(more info)