Head light problem

A weird thing happened this morning, I looked out the window at my 200 which I use for pay and play days and occasional daily driving and the headlights were on , the car hasn't turned a wheel in about 6 weeks, when I went out there the switch is in the off position. No time too sift through the Haynes for a wiring diagram yet but I would think there's only going to be a switch and relay in the whole circuit. anyone had anything like this before??
Kev