APPARATUS AND METHOD FOR TESTING A CHARGING SOCKET TO SUPPLY ELECTRIC ENERGY TO AN ENERGY RESERVOIR OF A VEHICLE

A tightness test device includes a charging socket to supply electric energy to an energy reservoir of a vehicle, which has a test adapter for contacting of a sealed plug connector of a wiring network including the sealed plug connector, a charging socket for mounting to an at least partly electrically powered vehicle and also a cable connecting the plug connector and the charging socket, a fluid supply connected to the test adapter which is set up to provide a fluid to the test adapter, and a measuring device for detection of tightness of the charging socket and/or of the wiring network based on the provided fluid. In addition, a method is described for testing a charging socket to supply electric energy to an energy reservoir of a vehicle.