WANGCL 12 Volt 7 Pin Trailer Plug Socket Wiring Circuit Tester Light Testing Tools For Caravan RV Truck Tractor Diagnostic

High-quality materials: The trailer socket tester is made of high-quality ABS plastic material on the outside and brass material on the inside. It has greater hardness and toughness, is durable and durable, and can be used for a long time and stable. Widely applicable: This 12V electrical trailer plug & socket wiring tester can be applied to trailers, caravans, bicycles with 7-pin plugs and sockets or 13-pin plugs and sockets (only for European vehicles) for towbar tester LED indicator: The trailer cable circuit tester has an LED indicator, which can indicate the circuit failure on the car or trailer. Safe and dependable performance, reasonable design, deft appearance, convenient usage. Easy to use: You do n’t need other complicated tools, just connect one end of the trailer 7 plug and the other end to the 7 pin plug and socket of the car. The installation is simple Use steps：One side of the tester is connected to the 7-pin plug of the trailer, and the other side is connected to the 7-pin socket of the car. indicator can indicate the circuit fault on the car or trailer.