Installed horn and relay. Relay operated by existing switch wiring (see attached).
Tested prior to closing everything up, worked fine. Bolted all up, tested, fine.
Tried horn on way to work,

nothing. Tested on way home, worked once. Tried when pulling into driveway,

nothing.
Opened everything up, tested fuse, OK, removed power leads from relay, connected meter, pushed switch, relay OK. Connected horn direct to battery, TOOT!!

, that was loud.
Reinstalled everything, push switch, :rant: nothing.
WTH! :banghead: Any advice from here? :don'tknow: