Can Old Dual Horns draw to much Amps?

[Jwawhite]

The 56 two door has Old and New (94) wiring. It looks like original wires to the horns and somewhere down the line is a modern relay and newer wires, under dash. The 30 amp fuse works for perhaps 10-15 honks and then the fuse goes. I might have an intermittent short or I was thinking the horns are on the way out but they still sound great. Should I try a larger? fuse or start tearing into the wires? New horns?