Your relay should have a +12V input from the battery, an output to the horn, and a "switch" that goes to the horn button.
When you ground the "switch", it should connect the +12V input and the horn output.
The relay shouldn’t have a constant +12V to the column(horn switch) right?
On a three prong relay it’s a supply 12v, a negative (switch to horn button ), and the lead to the horn right?
