a bit late but i am sure the jeff is correct,at one time my horn stopped working and all fuses and connetion to the horns looked ok,so i fiddled around with the horn boss on my mtech two wheel and the boss just popped off,there were springs and contacts in there,I cant rember exactly but when it went all back to gether it worked.......It seems ironic to me that you attempt and complete a project as complex as your touch screen and a horn is tough??????