Need help folks. Have read all of the threads concerning air horns. Have found the ground on the steering post and traced it down into a mass of wiring going under the coach or to left side electrical box. Stripped the wire before it disappeared and connected it up to a known working ground. NOTHING! Question? Without tearing the side of the coach off, where are the locations I might find the solenoid that work the horn? Any feedback would be deeply appreciated.

The air horn solenoid on our Sovereign is on an air manifold under the "hood" on the drivers side just under the dash panel. BUT! There should be a relay in the run panel in the left front compartment!