Can fuses be tested quickly with a test light?
Can fuses be tested quickly with a test light? A test light is a tool that you can use to check fuse power. A test light won't give you voltage readouts like a multimeter, but you can use one to quickly determine which fuses have power and which don't. Do fuses work once? The problem with fuses is they only work once. Every time you blow a fuse, you have to replace it with a new one. A circuit breaker does the same thing as a fuse -- it opens a circuit as soon as current climbs to unsafe levels...