@eokay check the Fuse F38 in the fuse box under the hood. It'll be a 20A fuse. See if that is ok. Next remove the cable off the horn and test it with a continuity light meter. You can get those at Walmart/ Harbor freight etc. Inexpensive but valuable tool. Check if it lights up when you push the horn button. LAst but not least your could just apply direct power to your horn. If it works, you know its your wiring/relay/fuse. If it doesn't it's your horn.