The vehicle circuit line detection instrument consists of a transmitter and a receiver. It can non-destructively detect short circuits and open circuits in the vehicle's low-voltage circuits. It locates the fault point by tracking the signal, has dual working modes, and provides strong or weak sound feedback signals. The operation is simple and it is suitable for vehicle repair and maintenance. Remember to turn off the power before using it.

The complete set of equipment includes a signal transmitter and a signal receiver, along with test leads. The transmitter connects the test leads to the circuit under test through test clips, emitting identification signals; the receiver receives the signals and traces the position along the circuit path to locate the break or short-circuit point. The device can conduct detection without damaging the outer casing of the wiring harness, reducing the workload of disassembling the wiring harness and improving the efficiency of circuit troubleshooting.
This automotive circuit tracing and detection instrument is mainly used for automotive circuit maintenance. It helps maintenance personnel identify circuit short-circuit and open-circuit faults. It is a practical circuit troubleshooting tool in automotive repair work, suitable for use in repair shops and DIY vehicle maintenance.

The receiver is equipped with an antenna, a speaker, and adjustment knobs. During the tracking process, it can determine the signal strength based on the sound changes, thereby determining the location of the break or short-circuit point. The device supports two working modes, suitable for different fault scenarios of open circuit and short circuit, and the indicator lights synchronously provide feedback on the working status, facilitating users to determine if the equipment is working properly. The body shape is designed to fit hand-held habits, making it easy to hold, and the button layout is simple, with a low learning curve for beginners.

The applicable range covers most low-voltage wiring harnesses in vehicles, such as lighting circuits and control circuits. Before operation, it is necessary to ensure that the vehicle is powered off. When connecting the transmitter, distinguish the positive and negative poles and firmly clamp the test leads onto the circuit under test. Move the receiver along the wiring harness slowly, pay attention to the sound changes, and find the position where the signal suddenly changes, which is likely to be the fault point.

During use, try to avoid areas with strong electromagnetic interference to prevent the signal from being affected and causing judgment errors. After the detection is completed, turn off the device power, tidy up the test wires, and store the entire set of tools. Regularly check if the leads and clips are damaged to ensure normal use in the next maintenance. For automotive repair professionals or those who enjoy DIY vehicle maintenance, this tracing tool can simplify the process of finding circuit faults, without the need to disassemble the interior wiring harness extensively, quickly locate the short-circuit or open-circuit points, save maintenance time, and is a convenient auxiliary tool in vehicle circuit maintenance.