I'm not sure this is the right forum but here it goes - I have a 1996 790 John Deere tractor. It's been on a trickle charger for the past 3 months. When I started it today it turned over kind of slow but it did start. I ran it for about 20 min. When I tried to start it about 20 min later it was dead. I have no headlights - nothing. I hooked the battery charger up and charged the battery to 100% - still no start, lights - nothing. I jumped the battery with my car - still no start or lights. No blown fuses found. Is there a main fuse somewhere between the battery and everything else? Any ideas? Thanks