Renegade troubles

Hello, my dad has a 2007 Renegade 800. Last week he had it idling and noticed that the rpms picked up. He looked at the display and it was idling around 14-1500 and lo battery, limp home and the check engine light was on. He shut it off and restarted it. It ran for about a second and shut off. Due to it having 5000+ miles on the original cam chains, we assumed that they stretched enough that it came out of time. We installed new chains and guides and attempted to start it. It wouldn’t start and we found out that the fuse, F1, that controls the ignition coils was blown. Put a new fuse and it started but was running rough and the same messages and lights came on as the first time and it again popped the fuse. Now if you even turn the key on it pops the fuse. Any ideas would be greatly appreciated. Thanks.