Why is my Ford c max horn not working?

When the horn is not working in Your Ford C-Max the first thing that You should check is the fuse to the horn assembly. If this is damaged then You will want to replace it because the horn is not getting power. If that is fine then the next thing You should look at is the wiring to the actual horn itself. If the horn has any loose or frayed wires then it will not work properly either. If the wiring is all good to the horn then that only leaves two other things that it could be. The first is there could be a problem with the horn switch, the second is that there could be a problem with the horn assembly itself.