DUOYI DY25 Automotive Cable Wire Tracker Short Open Circuit Finder Tester Vehicle Following & Locating Repair Detector 42V DC This instrument is designed to identify and trace wires or cables without damaging the insulation. You can also use it in checking for short circuit and locating open circuit and so on. There are a Transmitter and a Receiver included in the instrument. Features With a 3.5mm wired headphone jack, you can use headphones more accurately in noisy environments Probe hose included for easier handling Does not damage insulation Adjustable sensitivity Precautions for operation 1. Use at DC voltage only, never connect to a test environment greater than 42 volts. 2. Do not use in ac voltage environment. 3.Do not connect directly or indirectly to an AC line or any AC power supply line. 4. Do not use with any components or circuits of the ignition system. 5. Do not use with any ignition system components or circuits. 6. Do not use with any components or circuits of the ignition system. 7. Before using the instrument, please check the electrical wiring of the car and disconnect any parts or subsystems that are sensitive to voltage and current pulses, such as air pockets and electricity This instrument is designed to identify and trace wires or cables without damaging the insulation. You can also use it in checking for short circuit and loacting open circuit and so on.There are a Sender and a Receiver included in the instrument. Specification 1.Wire Tracing 2.Checking for short circuit 3.locating open circuit 4.Wire identification Function * Tracing of wires is made poible even inside bundles, conduits, behind panels, under carpets, upholstery, etc. * Easy to use: simply connect the transmitter in series with the circuit or wire under test, (i.e.: in place of a blown fuse, acro 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. * 42 V Ready: for use in the new generation of vehicles with mixed or single 42 Volt systems. * Operates on DC voltages from 6 to 42 volts. * Internally protected against power surges and overloads. * 7" flexible probe allows reaching wires in congested places. * Transmitter and Receiver LEDs show open or short circuit conditions. * Adjustable sensitivity for all tracing situations. * No wire piercing required, non-contact technology! The probe of the Receiver is built of coiled steel and may be bent as needed, in order to reach wires in ongested or difficult areas. Depending on the circuit characteristic and sensitivity settings, the probe will pick up the signal from the wire in a range of positions. However,for the best poible range the Receivers probe tip (black cap) should be positioned perpendicular (at 90) to the wire being traced and either above or below it.