I am studying to be an electrician right now. Recently a friend of mine wanted to do some work on a spare room over his garage. The room was never really completed by the construction workers. It is basically bare floor, finished walls and a ceiling. Instead of my friend trying to do the electrical work himself, I thoughtfully volunteered. Here is my question, I know it is required to have a switch at the top of the stairs and one at the bottom (yes it is greater then six steps). There is a single pole switch at the bottom but no switch to be found at the top. AND the light sockets are energized with the bottom switch completely disconnected. And the bottom switch will turn the lights on and off. Is there an easy way of finding the top switch without ripping the sheetrock off the walls?