A method for producing, on a metal retainer plate, an electronic module undergoing an electrical test. Prior to a final overmolding that forms the exterior envelope of the electronic module, there is performed a limited initial overmolding of at least one electrical-connection zone, thus surrounding a free-end portion of a rough form of an insulating second securing bar, by establishing between these a non-conducting overmolded bridge, a first securing bar is cut off from a component or element in order to electrically isolate said at least one electrical-connection zone, and an electrical test is performed on the zone prior to the final overmolding of the exterior envelope, with the electronic component or element being secured to the insulating second securing bar and to the retainer plate by the overmolded bridge.