The red wire goes to a balck terminal on the horn and the black to a red. Is this wrong and could this be why it is not working?
That is wrong the red is positive .black is negative ,that is earthed to the body of the horn .which in turn is earthed to the car body.by the bolt holding it on.
Testimonial: "Sorry - the horn is the speaker in my PA cab (not in a car) - I guess I didn't fill the correct spaces in earlier when I asked the question!"
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