2008 Berkshire Class A Horn won't shut off when engine is turned off

[gordonhuck]

We have a 2008 Berkshire Class A that is developing some issues. The most important one now is that when I park and set the brake, set the trany into Netrual and try to turn off the engine the horn starts blairing and will only quit if I turn the ignition back to "on". The motor does not have to be on to get it to stop but the only way I have gotten it to stop it to unplug the horn. HELP!!!!

[Lincman983]

I would check the Freightliner fuse box in the rear of the coach and either remove the fuse for the horn or the relay. The fuses should be labeled in the fuse box diagram under the cover. Sounds like the relay is stuck