Trailer Wire Connector Circuit Tester Trailer Buddy

Easy to use & saves time! Simply plug Trailer Buddy into vehicle's trailer harness. Then apply brakes, right/left turn signals, running lights, & engage reverse/12-volt charging. Each signal from vehicle emits a unique tone loud enough to be heard over shop noise. Electric brake control signal illuminates red LED. Tests left/right turn signals, brake/running/reverse lights, 12-volt charging & brake control. For use on seven-pin round connectors w/ flat pins.