hi i have a 97 jeep cherokee sport 2 door the other day i broke down at a light. before it broke down i realized that the volt meter in thr=e dash surged. iv replaced the altenator and ingnition coil it still didnt fire it was missing spark so i looked in the fuse box first good idea i had and fuse 10 - the auto shut down fuse was blown i replaced it with the 25 amp yellow fuse that came out and it blow as soon as i turned the key i then replaced it with 30 amp then fuse 18 blew another 25 auto shut down fuse, i replaced that with a 30 amp and it ran fine but now it has a draw in the system that ate my optima red top battery what did i do wrong and how can i fix this

 

sounds like you've got a short somewhere