7 Way Trailer Connector Circuit Tester Round Wireless 6 Function Led Light Indicator This trailer 7 way connector circuit measures 4 H 1.5 D takes the guess work out of connecting trailers. Designed with heavy duty nylon housing and bright LED indicator lights that typically have a lifespan of 10+ years tests 6 separate trailer light functions. Lt left : Marker lights TM tail: Maker lights RT Right turn signal: Right brake light 12V Power to trailer Bu Back up and Auxiliary Bk Electric brakes
