It would have been covered by the 3 year, 36000 mile warranty.
It is absolutely covered. Unless you have cut some wires deliberately or paid someone to perform aftermarket work which damaged the vehicle the car horn is under warranty. You may want to claim the feature is a safety device and pressure the dealer from that perspective.
It is inside the under hood fuse box.
The drivetrain warranty of the 2011 Jeep Wrangler is 5 yr./ 100000 mi.
The drivetrain warranty of the 2012 Jeep Compass is 5 yr./ 100000 mi..
The drivetrain warranty of the 2012 Jeep Wrangler is 5 yr./ 100000 mi..
The drivetrain warranty of the 2011 Jeep Compass is 5 yr./ 100000 mi..
The 2012 Jeep Wrangler has a 3 yr./ 36000 mi. basic warranty.
The drivetrain warranty of the 2014 Jeep Wrangler is 5 yr./ 100000 mi..
The 2014 Jeep Wrangler has a 3 yr./ 36000 mi. basic warranty.
The 2013 Jeep Wrangler has a 3 yr./ 36000 mi. basic warranty.
The 2013 Jeep Compass has a 3 yr./ 36000 mi. basic warranty.
The 2009 Jeep Wrangler has a 3 yr./ 36000 mi. basic warranty.