Oyviny 7 Way Blade to 4 Way Flat Trailer Adapter + Tester with LED Indicators for Truck & Trailer

Oyviny 7 way rv blade to 4 way flat trailer adapter quickly and easily converts your truck’s 7 pin trailer socket to your trailer’s 4 pin flat trailer plug, super easy to install, no any cutting or splicing required. 7 Way Blade & 4 Pin Trailer Light Circuit Testers. Plug in 4 way and 7 way trailer light tester equips a LED light for each electrical function. Plugging the light tester and check, you can easily read the green LEDs and find out which wiring has a problem

• 7 Pin to 4 Pin Trailer Adapter. This 7 to 4 trailer connector converts your vehicle’s 7 way rv blade connector to a 4 way flat connector on your trailer, great for running power from your vehicle
• Easy to Use. 7 Way to 4 Way trailer connector adapter is super easy to install, simply plug the rv blade 7 pin connector into the existing 7 pin socket on your truck, and plug the 4 pin connector to your trailer, easy plug and play installation
• Well Protected. 7 pin to 4 pin trailer adapter extension is protected by a black nylon wire loom to keep wires bundled together and protect them from wear, ensure long service life
• 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 testing for 2017 Newer Ford/GMC/Chevy model 📢7 pin trailer plug tester is unable to test LED lighting system 📢Doesn't work with vehicle has a lamp-out sensor, such as BMW, VW, Audi, Mercedes-Benz, Porsche etc.)
• 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