Scott,As you know the switches supply the ground for the lights to come on. They have to be getting ground from somewhere. I would think from looking at the diagram, there must be a wire pinched somewhere on the ground side.I would leave the fuse hooked up and while the lights are burning, but the switch is off, look for a short to ground. The lights would go off when found. Sorry, best I can do. John Hervey http://www.specialtauto.com/