I should say chances are it's not the relay. A quick check is to ground the "S" terminal of the relay ( green wire ). If the horns blow the problem is in the circuit from the relay to the wheel, and the relay is OK. BTW, the relay itself must have a good ground between the relay and inner fender, the same for the horns. If the relay and horns check good, check/clean the connector on the top side of the steering column under the dash. After that it's the horn ring and pray its not the slip ring contact in the column.....Bob.