starting this year Ive noticed a problem with my 400ex...

first thing that happened was the neutral light stopped coming on when it was in neutral.
then the battery stopped holding a charge...I put a brand new battery in it and it still wont hold a charge.
when it was running the light wouldn't come on and it would keep blowing the 15 fuze under the seat when I turned on the light switch.
after a while the starter button quit working....

I have to push start my quad everytime I wanna ride and its starting to get to be too much of a hassle.

I need help! does anyone know what could be wrong???

 

Start from the beginning. it might be a simple problem
While its running check what voltage you are getting. anything less than 13.5v is no good.
Check all the ground wires. remove them and sandpaper the metal underneath and then reinstall em. Check your whole wiring harness for cuts or abrasions. take apart ALL connections and clean em and put some dielectric grease in them.