Start on the Prevost web site, go to the seated coach side (not motorhome), go to parts and service, the go here:

http://www.prevostcar.com/cgi-bin/pa...e=publications

Then go here:

http://www.prevostcar.com/cgi-bin/pa...blicationspage

Then when you get here:

http://prevostparts.volvo.com/techni.../en/wiring.asp

Click on technical manuals, and at the bottom left go to manufacturers manual, scroll down to Allison and end up here:

http://prevostparts.volvo.com/techni.../en/manuel.asp

I don't know if what is needed can be found here, but it is a good resource. Allison, like Prevost expects techs working on the transmissions to link to their site for everything from diagnostics, to service information, to programming, etc. A password may be required to access what you need.