The van is spending the night at the dealership. They have taken it to the big shop and are doing a compression test on the body looking for water leaks that would cause all the wiring corrosion under the dash. The fuse block and relays will be replaced, parts ordered and should be here tomorrow. Still not positive it's a warranty fix, but it sounds like it will be.
Thanks upnorth for finding all the info on these relays. It would be wise to carry at least one along, maybe 3. I believe they would have cost me $26 each at McCoy, i will be checking and buying.
The big questions are, did excess condensation from living in the van cause this problem, and how do other RV's deal with this? Will cooking inside in the winter cause too much moisture to build up, leading to corroded relays? My condensation problem has not re-occurred since i started leaving the front windows open 1/4" to 1/2", both sides. Having the air deflectors on those windows is nice, rain cannot get in while they're open. That's about the only way i can vent this van right now.
Jef