My wife's car is having a similar problem. Today it turned its own headlights on and it hadn't even been driven today. As a stop-gap measure I pulled the headlight and parking light fuses (located under the rear seat in the fusebox towards the passenger side) I traced the clicking buzzing sound to a black box under the dash located on the right side of a white plastic brace. It has two connectors going to it and if you pull either connector off the lights go out. I don't have an answer for you, but at least I know how to turn your parking lights off. Of course after you pull the fuse they won't work when you want them either. Hope someone on the list has an answer for us.
Ben