So my boss got two dilapidated golf carts from campus for free almost a year ago. One of them was street legal with horn but neither of them ran. A friend donated an 'OOGA' horn that they had never used, so we wired it up and had everything except a proper button. Luckily there was a "Mushroom" button by NirDobovizki that I was able to edit to say 'HORN', and now we've got a golf cart with an obnoxiously loud horn!