Metal Rain: You are gonna get the QL Electrical Ground lecture
1) Lift the seat and remove the ground cable. Go to your nearest auto parts store and get a new one of the same or slightly longer length. (they sell 'em as starter cables). As a note: Automotive starter cables have the correct flat ends on
both ends of the cable.
2) Then look between the fender pan bolts and you will see a hole in the left frame rail. Clean the paint from all around this hole to bare metal, apply a bit of di-electric grease and using a new bolt, nut and lock-washer attach your new ground cable to the new location and then of course re-attach to the negative terminal of the battery. That will get you the required good ground connection to the frame.
3) Then go around to the right front side of the tractor, remove the side panel, and re-establish a good (clean to the bare metal!!) ground connections on that little ole short ground cable from the frame to the engine block!! If it's missing, then you will need to get a new (starter cable) short one from that same auto supply store. This cable is
required because the rubber Iso-Bar engine mounts make a poor-to-no electrical ground connection!!!
4) Now you may find that all kinds of electrical stuff that starts working..
5) Circuit is a form of the latin word for circle...The ground portion of an electrical "circuit" is just part of the "circle". A poor or no ground and the electric power (or enough of it) can't make the whole trip around the circle back to the battery!!
Lecture over.
Myron B