Last night driving to the house from my sugar shack with the headlights on. Get to the house, unload some tools out of the bucket and in that time the lights quit working. No headlight, tail lights, flashers, and I think the fuel gauge is not working either. Haven't had a chance to look yet but could it just be a fuse? Or could it be something even worse like the alternator? Any help is appreciated.
IF ALL went out at once - then I would not suspect just a fuse - there are multiple fuse for different circuits - the chance all blew at once would be ......
I would think that the main feed wire for the electrical system has come undone or has been broken.
Looking at this wiring diagram (this is NOT for the B6200 - rather the 5100,6100,and 7100 tractors) I would trace the wires from the starter motor if yours is similar to where this comes to the key switch - #30......this is where all the electrical gets the power to run in THIS situation.Then see if your Key switch has the AC out on the back of it - this is also where power is supplied to your lights - etc. Test for 12+ volts here
YOUR lights/flashers should work without the tractor running - just turning the key to the on position.
SOMEWHERE a wire has vibrated off, got cut or ........something, it might be a PITA to find, then again maybe not. Check all your fuses too with an ohm meter then trace the wires back to the battery - key switch and report back what you find!
Could be a bad key switch, or broken wire or ........