[mpumas]

I would disconnect the horn and then try replacing the fuse. If everything works except the horn and the horn relay still clicks without blowing the horn and the fuse, I would think the problem is a bad horn. I haven't torn a Honda horn apart but if it is like most horns, the diaphram causes the contacts in the horn to open and close. If they don't open, it over-currents and blows the fuse. I haven't got the wiring diagrams at-hand but will on Friday.