Just fitted two new horns, and guess what They work I just didn't think that both horns would stop working at the same time and keep blowing the fuse.I thought it was going to be a more serious problem so thanks to everyone for your advise
it's good to reposition those horns as to be able to orientate them downwords cos after a few pressure washings they will fail again, LR didnt conceive it well there and they dont like water inside