Hello I have a 41 ford trying to get the horn to work.I converted to 12 volts a while back I had no luck with the trumpets so went with a modern horn.I tested the horn and works I have it wired through a horn relay.I am trying to figure out the wire to horn ring how does it break contact.How does the contact plate work.I believe this is a ground wire so this wire is screwed to the horn ring how do I get power