To add to what Tiny said, the top mast bushing is insulated so the steering shaft (3/4" solid steel) does not touch the outer mast tube. The steering wheel is connected to the steering shaft with a key way and nut. This makes a solid connection to ground by way of the steering shaft, steering box, frame, and finally back to the battery. The "S" wire he talks about is shaped like a "S" and is under the horn button. It has two long 3" legs that go through the steering wheel and down towards the mast bushing. The two legs drag along the steering wheel holes making contact as they go. This is how the circuit is completed. On top of the insulated bushing is a brass ring. The wire you see at the bottom of the mast is hooked to the brass ring. As the "S" wire drags along the wheel, it completes the ground circuit by contacting the brass ring which sends the ground down the wire out to the horn. No relay is needed. If you add late model horns, just add a horn relay and use the horn button just as it is. Add again quoting Tiny, they are not the best set up. It will work, you just have to really push and sometimes wiggle it a bit. Joe
