Fixing a horn problem
A general tracking...........
Check underhood and underdash fuses for blown horn fuse.
Run a hot wire from the Battery to the horn. If horn blows, put a test light on the horn connector wire with the horn button down, and light should light.
If connector is hot/light lights, then the horn ground is bad. If light doesn't light, with horn button down, test the horn relay, and the relay socket.
Let us know your findings...............there may be
more steps involved.-Bob