Intalling a secondary horn

The horn on my 98 custom just isnt loud enough. Well, in the parking lot and local streets it is , but on the highway it is too low. Also, when i turn my steering wheel and try to sound the horn most of the time it wont work. My solution is to install a set of air horns with a foot switch on the floor where the old cars used to have the switch for the high beams .

My question is........Does anyone know where i can run the wire through? Is there an available opening in the firewall on the drivers side someplace?


Have a safe & Happy 4th ! :lol2:


Pete