?my Hyundai Vera cruz horn stopped working after I hit another car from behind

look in the owners manual.go to the index,look under fuses,go to that page and find the fuse position for the horn fuse,open the fuse box and check the fuse with a test light.if the fuse is good,check the horn,maybe the impact of the wreck cut the wires or just plain broke/busted the horn(s).

(Was it working just seconds prior to imapct??) .. In a 'quiet environment'.. Push horn button, hear relay click? .. Try it as many times as needed, if relay clicks, fuse is ok...suspect actual horn damage! FYI.. IF you're going to TEST any of the fuses.. **TEST ALL OF THE FUSES**.. It's just pure ol common sense to do so as many circuits share same fuse(s)!! .. Liable to be one over yonder in the corn patch that shouldn't have a damn thing to do with the horn.. TEST it anyway..Trust me on that! .. Takes another minute tops and then you know exactly where you're at and can move on with troubleshooting, IF needed.