My wife has a Rad City step thru. It is the first year model the brake light was standard, whatever year that was. Four years ago I think. It has been a great bike and she had ridden it many miles. Her only complaint is the weight. But I digress. Her brake light now stays on all the time. I have checked all the connections and both brake levers. They all seem to be functioning correctly. I am thinking the problem must be in the controller or whatever. Has any else had this issue? It isn't something that keeps her from riding obviously. I just have to see it all the time when following her. Thanks