My wife was driving our Jeep home today and the blinker started flashing very quickly, bulb right? Not so fast, changed bulb, cleaned up plate in back where bolts go through, put back together, same problem. Changed whole assembly, didn't help. If the headlights are on it blinks normally for a few seconds the same problem. then the light on dash blinks quickly, but bulb doesn't blink outside. Any ideas?