Started the excavator this morning to move it 50 feet out of the way, started fine, shut it off, about a hour later came back and tried to move it and when turning the key on it would beep, fuel needle moves, dash lights came on which is all normal but when I hit they key everything goes out and starter doesn't engage or make any noise. Tried key again and the same thing, kept trying the key, sometimes when key on the lights would come on, then others nothing at all when key is on. A couple times when the key in off position I could hear a buzzing coming from under the seat by the hour meter, turn key on and the buzz would quit, or when it was buzzing with key off it would quit on its own after 5 seconds or so. Now key in the on position is totally dead and in the off position there is no noises either.
I think this problem has been in the works for quite awhile now. As far back as a year I can remember needing to hold the key in the start position before the started would engage, it was very minimal though, like a second rather than instantly. Or I would turn it on, dash lights and everything would come on but try to start it and all would go out, it only did this a handful of times.
As far as a buzzing next to hour meter there is a small box there with wires going into it that says NGK on it.
Also I've test lighted fuses in the panel and there is power that far, but when am holding the test light on a fuse and its lit up and hit the horn or the ignition the light goes dim.
I've got some ideas, such as bad ignition or grounds, but what do you think? Is there any wiring diagrams available? Thanks in advance.