Have had my tractor die on me a few times while mowing this year. Once my son-in-law wiggled wire from battery to 25 amp fuse to ammeter and then it started. Tractor died again a month later and noticed 25 amp fuse blew. Replaced fuse and has worked fine many hours until today. Fuse was blown. Turned ignition off to relace fuse but there was still significant power going through the wire and arced when inserting the fuse (which immediately blew). I read in this forum that corrosion around the ammeter backing strap caused his fuse to blow. I removed ammeter and inspection of the wires, connections and strap found no smoking gun. Anybody have an idea what I can check / troubleshoot to find cause of high amps running through the fuse and blowing it? Thanks in advance.