BTP01 wrote:
This is good info that was not in the original post. Anytime something likes this happens after work is done, go back and look at what was done. I do not know where the jack problem was located, but a wire might have been pulled off accidentally. It might even be at the air horn solenoid or it's relay. I hope Tiffin gets back to you and that you will let us know what you find out.
Agreed. As a retired Supt of Maintenance for a large manufacturer, that has always been my motto. There is no such thing as a coincidence. Always go back and look at the last thing you did. But in this case, I was watching and I can't imagine that the horn wiring was anywhere near the area where they were working. If I can locate the solenoid I might be able to go from there.
Still waiting for a return call from them.