I'm putting in a new harness in my 41 1 1/2 ton, 6 volt. I'm not great with electricity so I'm hopeing to just follow the drawing. The truck came with a really great old horn. The trumpet is about two feet long. It's a very quiet horn. It's mounted on a bracket with what I think is a horn relay - three spade conections with no wires on them. The factory wiring diagram shows just one wire going to the horn and no multiple conections. The horn is hooked up that way now but who knows if if ever blew without the relay. Can someone tell me if I need the relay and how to wire it?
Thanks a lot, Joe H