RDMike, just had a long discussion on this in one of the other RV forums for the same reasons you want it. Turns out that Fleetwood didn't connect what was needed in that era. Mine is a 2007 40X.
A chap did a lot of research on it and figured out how to wire it but it involves running a wire from the back of the rig to the EC30 panel and some other stuff that's beyond me. If you care, I'll see if I can find a link to it but it won't be for a few days because we're going to a CG where web is tough to access.