I think the relay is not only about burning contacts etc perhaps it also offers a way to take the horn switch away from the:
a short= horn operation= fire scenario which the modern earthed horn live wire switch avoids.
(sorry I have been reading about fires by Taff the Horn in an old MPH!)
a short= horn operation= fire scenario which the modern earthed horn live wire switch avoids.
(sorry I have been reading about fires by Taff the Horn in an old MPH!)