Update. Thoroughly researched the problem at Brandon Automotive in Spring City PA. Must say Brandon is very knowledgeable. Spent the entire day with the GN on the DYNO. Will put my thoughts together on that and make a separate post. But regarding the lockup, we were able to confirm it was not engaging and by trial and error an "jumping" the appropriate connections we found all the components to be fully functioning but not working when needed. So there is a loose/broken wire somewhere under the dash which, being the end of a long day, I decided to search for on another day. But now I know none of the components are faulty, just a bad wire somewhere. I count that as a success.