Check the listing for details. Hopkins Towing® 48655 - 4-Wire Flat Tester with LED lights. Condition: New. Listed at 10.59 USD. Hopkins Towing® 48655 - 4-Wire Flat Tester with LED lights With over 60 years of invaluable experience, Hopkins® is recognized to be the automotive industry leader in providing exceptional quality towing electrical products. Since the company's early days, it has been guided by the philosophy that all the parts they create must deliver meaningful innovation, value, and performance to the client. According to the company's current rating, they seem to have succeeded in achieving their goals: today nearly 40% of all towing electrical retail sales are proprietary Hopkins innovations. To generate such great results, the manufacturer employs more than 500 people on two production facilities. Almost any trailer features a specialized electrical plug, which connects it to the towing vehicle's electrical system. Still, there is a number of automobiles that do not have a matching electrical socket. Fortunately, aftermarket trailer wiring kits can be installed to interface with the trailer plug. We are proud to offer top-quality and high performance wiring kits and harnesses by Hopkins to satisfy all your towing needs. Wiring for your trailer can be as easy and quick as plugging in a USB stick. If it's hard for you to believe that, it's high time you get acquainted with the Hopkins Towing Wiring Harnesses and Kits. These extremely effective add-ons come equipped with OEM connectors to ensure a snug, weather-tight fit, and are made of heavy-duty materials to withstand the rigors of heavy towing. Also, each and every kit comes complete with all necessary hardware and easy-to-follow instructions. Instead of using a wiring harness that requires you to cut or splice into your existing tail light wiring, go with the Hopkins plug-in style wiring harnesses to save both your time and effort. 4-Wire Flat Tester with LED lights (48655) by Hopkins Towing®. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer must have a reliable connection with the signaling system of your car to operate properly. This superior product is perfect to make your trailer towing experience safe and convenient.Red LED Light Will Glow If Connection Is CorrectTests Left Turn And Right TurnTests Brake And Tail LightsTests Marker Lights4-way flat tester with LED lights plug into towing vehicle connector to check vehicle’s wiring systemDoubles as a colorful and protective plug capThank you for your business and may you have happy trails from here and forever! RoomaZoom Powersports