If there is a HARBOR FREIGHT store in your area, stop in and get a "volt" meter. Actually it measures just about everything electrical, like ohms (for short circuits), etc., etc., etc.,....be the first one on your block, amaze your friends and family. The price is about five bucks, three or four if its on sale. It's about the size of a pack of cigarettes and will fit into your shirt pocket. It might be a little short on instructions, but you can drop by the library for a short course on how to use it.