Does anyone know what could cause my rear turn signals to be on when I am not using the turn signal. They are two wires in the back so they used to only go on when I was turning. The front turn signals of course are 3 wire, one for ground, 1 for having the lights on all the time, and the other for when it blinks. But I am not sure as to why my back ones are on now, it should not be. And one of them is slightly brighter in the back than the other. I did recently in the last month or so change my front turn signals to the kind that have clear corners and a smaller bulb than a 1156 or 1157. Could this have anything to do with it??