I recently acquired a 2005 3L V6 x type.
THE horn is not working. I checked the fuses. The funny thing is that the alarm uses the same relay and works perfectly.
When you press the steering wheel button the relay clicks.
We removed the bumper, but can only find one horn in front of the left wheel.
We are stumped. We have rebuilded a 2003 Jeep Grand Cherokee V8 and sorted out some very difficult electrical problems.
Any ideas what else we can do except take it to an auto electrian?

 

Found the location. No horn. Bracket & plug is under the battery box.

 

That will do it!