Damn, i love this place. Had been screwing with horn that didn't work. Slits told me all the things to check, I did, and
good news: I became one tootin' SOB
bad news: I couldn't stop tootin'. Pulled fuse
Aaron says, check your fingers. Huh? The contacts behind the wheel hub, stoopid. OK, pulled the wheel, fingers were fine, but PO had used Christmas tree style wires from horn button to ring when he installed Momo, and insulation wore off. Replaced wires and now I can toot whenever I want.