Last night I connected the horns on my 67 RS. After bolting them on and connecting the leads, I couldn't get them to work (and I knew the horns work). I went in for dinner and about 15 minutes later with nobody near the car, the horns started blasting away!!! I had to go out and disconnect the leads (apparently the horn button is stuck) to get it to stop. Any idea why they wouldn't make any noise when I connected them but then started by themselves later?