Okay here is the deal whenever I key the ignition on or start the car the running lights come on and all the dash lights plus it turns my rear window defrost on. Some how its feeding power to the headlight switch. I got the whole dash area tore down and I've been looking for a bad ground or something. I'm not sure if its the ignition switch or the headlight switch. Has anyone ever heard of the headlight switchs going bad? What could be causing this? Help me out if you can!

Thanks