I'm no expert on electrical isues, in fact its the automotive topic I know the least about. What I can tell you is that I replaced a burned out left side headlight with a new sealed beam unit (Sylvania Halogen) and in low beam, after a couple minutes, the lights would blink uncontrolablly, Switch to hi beam and they worked just fine. I replaced that unit with another new one and have not had a problem since. Based on that alone, I attribute the problem to a defective headlight. My assumption was that the unit was causing a draw and overheating the circuit and the lights would go out, given a few seconds to cool, the lights would then come back on. I may be way off here but like I stated above, electrical issues are not my forte. Sorry I can't be of more help.
