This is a great tool to find problems in wiring! If you can't find it with a wire locater you probably will find it with this (if you know how to use it properly). I'd rather be within a few inches of a wiring fault than a few feet, especially in the heavily landscaped yards that I work in. Gotta have a locater to mark the wiring path first though. And read the manual! This device can give false readings but the manual shows you how to identify them.