JohnBarkle3

I don't know what a smart steering wheel is, just that the cruise, windshield wipers and horn are located there . There are several fuse boxes in the coach including the one you have described in the left outside bay. This box has been checked and all fuses were ok. John

I should have added that I don't have any manuals that tell me anything. They are all component related, i.e. appliances, heater, sound system, etc. There is one large book that covers the, RV, but nothing concerning wiring other than the location of fuse panels (which have been checked). You're theory about what happened was exactly my thinking at the time it happened. Only problem is my lack of mechanical experience and no idea of where or how to start looking for the solution other than take it to a pro.

All switches are located in the steering wheel. I originally thought that the problem would be in the steering wheel or column, however United tells me they have checked the wheel and all is OK (if that means anything).

The air horn on my 2007 HR started blaring when we were parked at our campsite in Maine two months ago. The engine and ignition switch were off and the only way I could get the horn to stop was to turn the ignition switch on. We drove to the next campsite and I noticed that while the horn worked normally the windshield wipers and the cruise control did not. After about fifty miles the horn stopped working and the cruise control and wipers worked fine. All was OK until our return to home in Las Vegas about a month later except the air horn did not work. Since I want to sell the MH, I attempted to have the horn repaired and took it to United Auto Service which was recommended to me by Johnny Walker RV. They found a melted horn relay, replaced it, and the horn now works. The cruise control and the wipers do not. United is not able to find the problem, say they need a wiring diagram because they believe the problem is in the wiring harness, and suggest I take it back to the dealer. Problem is that Roadmaster made the chassis, Monaco the coach and both are out of business. Any suggestions.