AOHEWEI 13 Pin Trailer Lights Plug and Socket Tester 12V Wiring Circuit Electrics Diagnostic Tool Connector for Towing Car Caravan or Truck

Fast Check -- The 13pin light electrics diagnostic tool tester is designed to indicate a failure in the wiring on both towing vehicles and trailers promptly. Easy to Assemble -- This 12v brake light tester are easy to operate. One side connects to 13pin plug and the other side to 13-pin socket. Premium Quality -- Those electric wiring testers are selected with superior plastic and cross slotted copper, which naturally match with the trailer female or male. Extensively Use -- The 13 way trailer plug tester set are normal European standard. It can be widely used to car, caravan, RV, or any other commercial vichel freely. Kindly Reminder -- The trailer circuit tester requires 1pc 9V battery (not included). And if any problem, please do not hesitate to contact us at your convenient. We will try our best to help you.