Good afternoon to the ladies and gentlemen, How the title could be revealed a little bit I am about to retrofit a warning flashing system. Have there only a small problem, I would need a relay which is mass controlled. Does someone know one which is really mass controlled? Plus lies on the coach and mass is switched. Have already tried a few, but did not work as it should. Villeicht knows one of you a relay that does not care about the control / polarity ?