This dual-output 4 pin to 4 pin and 7 pin trailer wiring adapter makes it easy to connect a mismatched vehicle socket and trailer plug, it features both 4 Pin and 7 Pin connector in case you have multiple trailers with different connectors
2 way trailer wiring adapter offers a trusted power supply for towing, works on most vehicle wiring component like turn signals, brakes light, taillights and auxiliary power(some splicing required)
2 in 1 Design. This trailer light tester combines both 4 way circuit tester and 7 way trailer light tester, allows you to test both the 4 pin and the 7 blade connectors. Easy and quick to test trailer circuits on most trucks. ( Notes ?The trailer tester will upside down when plug into 2017 Newer Ford/GMC/Chevy model ?This 7 pin trailer plug tester is unable to test LED lighting system)
6 Light Functions. Versatile trailer wiring tester can be used to test 6 separate trailer light functions, quickly confirm the functionality of taillights, brake lights, reverse lights, turn signals, electric trailer brakes and 12V auxiliary power on your vehicle
Durable Construction. For long-lasting use, Connectors are made from durable ABS plastic, which will never rust or corrode. Tin-Plated copper terminals makes great conductivity
