The automotive industry is heading for an electrified future and that brings new challenges for the validation processes. This thesis project was carried out at Volvo Cars in Gothenburgat their validation department for electrical propulsion. The goal of this thesis is to propose a test method for measuring bearing currents in a permanent magnet synchronous machine. Bearing currents are electrical discharges between the rotor shaft and stator frame going through the bearings. These discharges can damage the bearings and thus is a large contributor for premature failure in electrical motors. By reviewing and evaluating several methods,two final methods were chosen for future testing. The two chosen methods were insulated bearing current- and shaft voltage measurement. A physical validation of bearing insulation was attempted without success, even thou these methods are still recommended for future work.