Abstract: System and method for locating resistive faults and interconnect errors between the conductors of a cable such as a telephone cable. An alternating magnetic field is applied to the cable at successive points along the same and the signal produced by the induced voltage is monitored at one end of the cable. With a resistive fault or an interconnect error, the signal at the end of the cable is discernibly greater when the magnetic field is applied between the sensor and the fault than when the field is applied beyond the fault. In either case, the location of the fault is indicated by the change in the sensor signal as the field is applied at points on opposite sides of the fault. The signal information is communicated to the person who is applying the magnetic field to the cable for use by him in locating the fault.