I returned the first one because I thought it was deffective but then the second did the same thing. I have tried 3 different positions sofar, neg on coil, blue wire off distributer, rpm signal off ecu and all do the same thing, just blink whenecer they feel like it. Its not to cool because at night time it will scare the shit out of you and blind you at the same time and almost got me into an accident. Im wondering if its at all possible that the igniter could be going bad or something??? who the hell knows.