A ball and socket joint in a vehicle control link and methods therefor including a ball with a connecting member coupled thereto disposed and pivotally retained in a socket by molding a plastic ball in the socket or by molding a plastic socket about the ball. The driving method comprising: detecting an environmental temperature, and expanding andor contracting the driving waveform to be applied to the electromechanical transducer, in a voltage axial direction and a time axial direction, in accordance with the detected environmental temperature, and applying the resulting driving waveform to the electromechanical transducer. Along with separate spare lines, melting connection can be obtained to form a circuit path and to compensate for broken wires.