Fault Finder - Find shorts, opens, broken wires or current leaks inside wire bundles, under carpet or behind panels. For 6 thru 42 VDC circuits. No wire piercing required-just connect transmitter in series with the wire and scan the current path with the tracer's probe. Batteries included. Black Liquid Eletrical Tape (25012) is a convenient brush-on sealer for wire splices.