Check the listing for details. Pro Automotive Short & Open Finder Circuit Tester Wire Tracker Circuit Finder. Color: Black, Condition: New. Listed at 37.54 USD. You can quickly and easily Locate short circuits, open connections, broken wires, current leaks and even trace wires. Transmitter and receiver LEDs show open or short circuit conditions. 【QUICK AND EASY DIAGNOSTIC】 Judge continuity of the cables or wires, and diagnose the break point.