Just purchased a 1999 Monaco Diplomat and it is at Redlands Truck & RV getting thing fixed.
There is their message: "This coach does not seem to be equipped with an air dump switch. There is a blind switch on the dash, but have not located anything, even through Monaco."
I can not believe the coach did not have one originally. It is the Monaco 1999 Diplomat 38A slide model. Anyone with that model now? Do you have an air dump switch? Thanks.