The relay center should be in hte engine compartment. Once you open the hood and are facing the front of the car look to the back left by the hood hinge. You should see a black box that has a diagram on it. Take the cover off and use the diagram on the cover to pinpoint which relay is the horn. Hope that helps.
Yes, there's a fuse + relay box in the engine bay, but that's not where the horn relay is.
Horn relay is on the under-dash fuse panel. Left (driver's side, in the USA) side of car. Horn relay is way up at upper edge of the panel, mounted on a tab so it's sort of off the edge of the panel. Relay has a gray housing with a 4-wire connector going to it. Squeeze tab on the connector lets you pull it off the relay. Squeeze tab at base of relay lets you pull it off the panel base.
Reference:
http://www.Honda-tech.com/showthread.php?t=2153943
How do you repair 1999 Honda Civic Horn?
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.
The 1997 Honda Civic Horn relay is found under the drive side dash panel. The relay is mounted next to the starter relay on the right side of the fuse box.
http://wiki.answers.com/Q/Where_is_the_horn_relay_on_a_1995_Honda_Civic"
Near the engine (inside the bonnet)
More than likely a blown fuse or defective horn relay.
The relay just plugs into the fuse/relay box, installing it means reading the owners manual to determine the correct location and plugging it in.
The 1991 Honda Accord horn relay switch can be found mounted to the radiator. The horn relay switch will be on the right hand side of the radiator housing.
First thing to check is the fuse. If the fuse is good check the relay. If that is good check wiring. Can also be the horn switch or the horn itself.
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.
The horn relay on a 1994 Honda Del Sol is located in the engine compartment. It will be behind the fuse box.
The 1998 Honda horn relay switch can be found on the inside front quarter panel. The relay switch will be on the drivers side door panel.
The horn relay on a 1998 Civic DX is located under the dash on the driver's side. It is just to the left of the turn signal flasher, and to the left of the steering column.
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.
Pull the fuse or the relay.
The horn is located directly below the inner side of the passenger side headlight.
behind the front bumper
There is no horn relay on a 1988 Honda CRX Si. The horn is wired to a negative terminal and sounds when the contact touch. There is no need for a relay using this type of set up.
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.
Which specific model? They all vary.
My EX had horn located at bottom of bumpercover, is't black about 4" in diameter. Easiest to access by removing frmt bmpr cover.
Horn location for a 1991 Honda civic HBTo access the horn, you have to remove the front bumper. The horn is located on the passenger side of the car covered by the front bumper. You can see it by looking through the "bumper grill" near the passenger side front tire.
Blown fuse, defective horn relay, defective horn, loose or broken wire. check the fuse check the horn relay check the electrical connection to the horn check the horn check the horn switch
inside the front grill