Abstract: A method of testing an electrical conductor assembly having a plurality of networks is divided into a first test routine and in further test routines. A conductor assembly is tested in each test routine. In a first test routine, a field test for detecting short-circuits between the individual networks and a resistance test for detecting open-circuits in said networks are implemented. From the data sets resulting from the field test, complex conductances are determined between at least one antenna employed in the field test and the tested networks, which are used as reference conductances for the further test routines. In the further test routines short-circuits between the networks and/or open-circuits in the networks are detected by sensing a complex actual conductance between each network and at least one antenna and by comparing the actual conductance to the reference conductance. In addition the invention relates to an apparatus for implementing the method.