Automotive Wire Tracer Electrical with Battery, FIRSTOOL EM415Pro Automotive Short & Open Finder Circuit Tester,DC 6-42V Fault Probe Cable Tracer,Circuit Breaker Finder for Car, Boat, Trailer etc

【Car Circuit Tester with 9V Battery】The 9V battery has been equipped with the transmitter and receiver. So you can use this broken wire detector tool for locating the circuit breaker point and open connections immediately once you receive it, Not like others without battery, it saves you the time and expense of having to buy them separately.

【Multifunctional Circuit Tracer】This multifunctional circuit tester automotive is a convenient and efficient circuit breaker finder kit that effortlessly locates circuit breaker point, broken wires, open connections, current leaks with tone change. It rapidly assesses cable or wire continuity and diagnoses break locations without damaging insulation, even tracing circuits hidden behind dashboards, panels, carpets, or within engine compartments—all without stripping insulation. During operation, the transmitter sends signals while the probe precisely tracks the path, significantly reducing troubleshooting time and effort.

【Detecting Short Circuits and Open Circuits】In the CONT mode of the continuity tester, attach the red and black clips to both ends of the wire under test. If the green indicator light illuminates, it indicates a short circuit exists or the wire is intact. If the green indicator light does not illuminate, it indicates an open circuit exists.

【Locating Breaker Point】In TONE mode of the circuit breaker finder tool, connect the transmitter's black clip to the circuit's positive power source (or to the negative terminal for vehicles with positive power connected to ground), and connect the red clip to the circuit under test. The receiver will emit a rapid beep when over intact wire sections. Upon moving to the break point, the beep will significantly weaken or cease. Note that volume is affected by signal strength. If the sound is faint, adjust the probe position to enhance the signal and ensure detection accuracy.

【Easy to Use】Simply connect the transmitter in series with the circuit or wire under test, scan the circuit/wire with the tracer's flexible probe to find the fault point, such as on the connector, light bulb socket, where the fuse is blown, in series with the open wire, etc.). The adjustable sensitivity ensures effective tracking in different situations.

【Widely Applied】Electrical wire tracer for diyers, mechanics, and technicians to simply and quickly judge the continuity of the cables/wire and diagnose the breaker point. Additionally, It is suitable for a variety of circuits with a dc voltage between 6 and 42 volts, such as cars, trucks, tractors, boats, rvs, etc.