Key features

• •3 in 1 Design: This trailer light tester combines both 5 way circuit tester and 7 way trailer light tester, allows you to test the 4 pin flat, 5 pin flat and the 7 blade connectors, easy and quick to test trailer circuits on most trucks; Upgraded Double-sided design allow you to read the LEDs from both top and bottom sides; Note: This trailer tester does NOT work with vehicle has a lamp-out sensor, such as 2020+ GMC, Chevrolet, BMW, VW, Audi, Mercedes-Benz, Porsche etc.
• •Acts as a 7 Pin to 5 Pin Trailer Plug Adapter: 7 way rv trailer tester can be also used as a 7 way to 5 way trailer adapter, converts the vehicle-side 7 pin output to a 5 pin flat adapter to connect the 5 way or 4 way trailer light plug
• •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
• •Bright LED Indicators: Plug in 5 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
• •Durable Construction: For long-lasting use, this 7 blade RV trailer tester is made from durable ABS plastic, which will never rust or corrode, Tin-Plated copper terminals makes great conductivity
• •Simple to Use: No batteries or wiring needed; 7 Blade & 5 Pin Tester is easy to use, ergonomic design is convenient for plugging in or unplugging; Widely used to test trailer light circuits on most Trucks, Boats, Trailers Campers, Caravans, Food Vans and other Towed Vehicles