Oyviny 3in1 Trailer Plug Tester 45 Pin Flat 7 Pin Trailer Light Tester with DoubleSided LED Indicators 5 Way 7 Way RV Trailer Connector Tester Not Suitable for Vehicle with Lamp Out Sensor

3 in 1 Design This trailer wiring tester combines both 5 way and 7 way trailer tester allows you to test the 4 pin flat 5 pin flat and the rv blade 7 way trailer connectors easy and quick to test trailer circuits on most trucks Note This trailer tester does NOT work with vehicle has a lampout sensor such as 2020 GMC Chevrolet BMW VW Audi MercedesBenz Porsche etc Upgraded DoubleSided LED Indicators 5 pin flat 7 pin trailer plug tester designed with LEDs on both sides for easy reading Unlike the other testers only have one side leds which make it hard to read A great tool to help troubleshoot issues or verify you have install or fixed your trailer plug correctly 6 Light Functions Versatile trailer socket 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 Multifunction trailer hitch 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 longlasting use this 7 pin trailer plug tester is made from durable ABS plastic which will never rust or corrode TinPlated copper terminals makes great conductivity Simple to Use No batteries or wiring needed Trailer light checker 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