Trailer Socket Tester 7 Pin Electrical Tow Bar Wiring Circuit Light Test Tool for Truck RV

Smart Socket Tester: This socket tester can test every pin socket functions of the car, and the whole is very simple. Clear in Indication: There are clear lights and label on the test tool, this tester indicates quickly if a failure concerns the wiring. Wider Compatibility: One side can connect the 7 pins plug of a trailer and another side can connect the 7 pins socket of a car for test. Item Type: Trailer Socket Tester Material: ABS, copper. Battery Specification: 9V battery, not included. Applicable Range: Suitable for the test of N type 7 pin trailer plug socket connector. Trailers and RV can also be used.