not sure on relay location,might be under dash left of column.should have three prongs.one lead to horns,one 12v ,last ground from column.quick check is use test light,clip grounded ,go to column harness connector.usually a blk wire,touch probe to backend of connector.relay will get grd through t/light and blow horn.a simple tip on elect problems "kiss it" meaning, keep it simple stupid. we tend to over think and pull thing apart before simple steps.please don't misinterpet,not insulting anybody just passing on what works for me.