AERMOTOR Automotive Short And Open Circuit Finder Tester Wire Identifier Flexibe Probe. Special Features:short cable finder. 1 x Automotive Short and Open Finder. Easy to use: simply connect the transmitter in series with the circuit or wire under test, (i.e.: in place of a blown fuse, across a connector,in series with an open wire, a light bulb socket, etc.), and scanning the circuit/wire with the tracers flexible probe to find the trouble spot.