For quick, easy, and professional detection of short circuits, cable faults, and leakage currents without the need to pierce wires. Significant time savings, as the removal of coverings, carpets, and trims in the vehicle can be minimized. The need to provoke short circuits is eliminated. Ideal for tracing cable routes and locating electrical components in the vehicle. For detecting interrupted circuits or cable breaks, as well as identifying the cause of significant battery charge losses. For testing and locating intermittently interrupted connections. The transmitter is connected to the circuit being tested via insulated alligator clips. The emitted signal is received by the receiver and indicated both acoustically and by a directional LED. Following the line, the fault can be localized. If no signal is heard from the receiver, the short circuit has been found. The transmitter can be optionally expanded with headphones via an integrated connection. Applicable for circuits from 12V to 42V. The search sensitivity can be adjusted continuously. Includes 2 x 9V block battery and comes in a plastic case.