No expensive FLIR to find your short? Here's an easy way from one of my favorite car repair channels using a circuit breaker, a test light and a auto-parts store analog ammeter. In this case, the fuse keeps blowing when you try to start the car. But where is the short? The fuse feeds a lot of circuits so you need to know where to look. This guy owns his own repair facility but he also teaches college classes on vehicle repair.