1974 Horn Fused Circuit

[paul67]

I have been doing my usual klutz work and broke a part in the steering column related to the horn. When I pulled the horn knob the three nylon studs on the upper contact assembly snapped. I will fix that but I think I blew a fuse. The Owner's Manual does not tell me how/on what circuit the horn is fused and neither does the AIM. I could have blown the relay also but does anyone have comments?

All lighting works. Where is the horn relay located?​