So I think I got everything I need to put the horn back into the steering wheel. Pictures below.
I am just not sure on the wiring and how it works. I'm pretty sure I know where everything hooks up, but how does the horn button/wire work? Does it ground out the relay pin? I'm pretty sure it doesn't pass 12v to the relay (since I don't see where I would run 12v to it) or... am I missing something else?