Abstract: A method and an apparatus for locating from above the ground or water the position of or cable fault in a cable buried underground or underwater. An alternating magnetic field generated by high-powered electromagnet or a rotating magnet induces an indicator signal current in the wires of a cable to be examined. At one or both ends of the cable, the indicator signal is monitored by means of a receiver connected to the cable wires. The received and amplified indicator signal is transmitted by a radio phone back to the point of transmission, whereat the indicator signal is listened to for detecting the location of a cable and its possibly faulty section. According to the invention, a sufficient direct voltage is supplied between the wires of the cable. This creates a current whose loop closes through a faulty location and the indicator signal is separated from the current produced by the direct voltage.