1998 Mazda Protege no start

A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. A brake light bulb works well. When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it's not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.

Depending on what's on that circuit, it might not operate when the short is gone because the brake light bulb will limit current to less than one amp. You may want to use a head light bulb instead. That will allow up to around five amps to flow and that may be enough for some items to function.