Where is the horn located?

Horn will be located behind front bumper/fuse should be in fuse box under hood.

Horn is not working on a 2013 Chrysler 300. Would I need to replace the horn itself or a fuse?

if you do not have power at the horn the fuse is blown. if you have power then the horn is bad.

Quel fusible pour le briquet Chrysler 200 2013 moteur 2.4 numéro Seri 1c3ccbab6dn691189

What color is the horn fuse on a Chrysler 200 diagram

Yellow 20 amp. Some cars have spare fuses in fuse lock indicated on the fuses page.

why does my horn randomly start honking