Wesbar Trailer 7 Way Blade Wire Plug Tester w/LED Display 767943
Wesbar Trailer 7 Way Blade Wire Plug Tester With LED Display #274-767943
- Designed to help you quickly identify problems in the wiring of the trailer. Provides instant test of running light circuits. Features LED display to show completed circuit for the running lights, and turn signals. Will also test the voltage of the external battery connected to the trailer charge circuit (i.e. trailer battery).