I've read other posts on various Focus wiper problems, but none fit a problem which popped up on me today. Was driving my 2007 SES wagon today in light rain and all of a sudden the wipers went full left (the driver side wiper went completely off the window). You can still hear the motor running while the wipers are turned on, which I turned off quickly. Anyone had this happen before, and have any idea what the root problem might be (stuck relay, bad wiper position sensor, etc.)? Car is just over 125K miles.