The bat light is staying on so i tested the 2 wires from stator where they hook to the rectifier and im showing 30-32 vac then i hooked them back up to the rectifier and pull the center wire off the rectifier and at the rectifier im showing 13.20 vdc but as soon as i hook the wire back to the rectifier it drops to 12. vdc. I just got this tractor it belonged to my dad whos no longer here and since he has been gone it hasnt been kept up with so now that i have it im bringing it back up to its original state which will include a complete restore after i have fixed every thing thats wrong with it. I dont currently have any books for it but there coming so i dont have a wiring schematic but doing some net research i am seeing that there is a time delay control module on this tractor which is a 1990 and i removed it hoping to see something bad on the board but it looks to be in great shape and i have read that it controls the charging on this tractor but i dont know for sure if it does or not. I have checked all the wire connections and they look to be good and clean this is also a new battery and it runs and operates like it should it just is not charging any help would be great