My guess that the horns are either not the original horns,(Common because they get water in them and rust and wont blow!) or somebody tried to adjust the front bumper fit and bent the brackets to get them out of the way instead of taking 1 bolt out to remove them!!!!(Purdy common too!!
)
Or,They took them off and put them back on the wrong side upside down!!
C4 correct factory horns and brackets!
1.Left
2.Right