I know u guys like these air horns at pep boys and autozone so this is how u hook em up. This diagram is for a negative trigger. Which most cars are. If your not sure what your horn trigger is just email me
BClaps@twcny.rr.com All civics have a negative horn trigger.
edit: because you can't attach large images, fallow this link to the enlarged image
http://civicsi.mine.nu/other/AirHornHookUp.jpg