FNG…. Honda 400ex Fourtrax

Hey Guys, new guy here…. I recently bought a Honda 400ex after $1000 for the quad and $1200 to the local shop it’s running… However, seems to me as everytime I hit the headlights on the 15amp fuse in the rear battery area blows…. Also the neutral light stays on every gear, sometimes blinking on and off slowly….. Can’t seem to find the issue…. I have a random blue wire thst comes from the back area colenoid battery area. And is attached to a random bolt on the frame… Definitely not where it goes… But when I ungrounded it the quad won’t fire by switch…… Maybe my problem I’m unsure…… Indo know when the fuse blows the start switch and headlights do not work…. ANY IDEAS WHERE TO START? THANKS IN ADVANCED….. F’IN NEW GUY…. FNG