i think it's pretty rare that it would be the horn, probably loose wire in the steering wheel. but the horn is located behind front bumper cover passenger side.
The horn relay is mounted underneath the dashboard on the 1995 Honda Civic. The unit is mounted on the upper right of the cabin fuse box.
http://wiki.answers.com/Q/Where_is_the_horn_relay_on_a_1995_Honda_Civic"
The horn is located directly below the inner side of the passenger side headlight.
How do you repair 1999 Honda Civic Horn?
not having a horn
red
On the Steering...
The horn on a 2005 Honda Civic is located at the front of the engine compartment near the headlights. This position allows it to be projected out of the vehicle and heard better.
Middle of steering wheel
The horn sits in the middle of the steering wheel. There are horn symbols just left and right of the Honda badge. Press either one and the horn will sound.
behind the front bumper
The horn button on a 1994 Honda Civic clip on to the steering wheel. If the clips did not break off the button should just snap right on.