Conclusion, kind of.
After two months of dealing with charging issues, chasing wires, connections, switches, etc., I finally out of desperation installed a new PP alternator. Guess what? All my problems went away! So while the manufaturers were 99.9 percent sure this was a wireing issue, and everything I tried keep pointing back to the alternator, it ended up being the alternator. Go figure!
In a followup discussion with PP, they suggested I return the old one even though it was way off warranty, to try to find out what the failure point was, for future reference. Well, 5 days later I get a package with a new alternator from PP with a note that they were covering it even though it is off warranty. Totally unexpected! Still don't know what failed but outstanding service none the less.
I hope that all of you that are having these same types of problems with the same set ups take this information, and from several other threads I have been on, and get another alternator to try for a few minutes earlier in the search for the issue. Save yourself a lot of time and aggravation.
Finally, although not all the suggestions on the forumns are helpful, there were many good ideas and a lot of solid suggestions of common setups having the same issues. Very interesting and worth watching in the future to see if there really is a common thread to the PP failures being caused by any number of modern systems employed today.