Here is a link to the Monaco website where you can get a manual.
Also, go here
Contact Monaco Coach
Use the middle column and request a wiring diagram for you coach, get a house and chassis wiring diagram, they'll send in PDF format but it's easy to use and you can zoom and search. Request a data sheet also, it will most of the main components listed by manufacturer and model/sn. Once you have this you can do some searches on those items and get trouble shooting manuals.
You can also ask a specific question on how your system works, Monaco has good tech support and will respond promptly.