Sick of loading up the boat or camper trailer only to find out that the left blinker doesn’t work on the trailer? Then spending the next hour scratching your head thinking is it the trailer connection or the back of the car. Let Kt cables take the hassle out with there unique LED trailer plugs that tell you exactly where the problem is. The inbuilt circuit tester lights up each connection point when power is supplied to it. Remember no light no power.