So, thanks to publicenema and the help of others on here, my MRZR is running very well. Turns out that the relay/fuse configuration diagram he first uploaded was incorrect, even though this more detailed diagram (he sent me) has the needed slots filled and is correct, and from the same manual
View attachment 930281. I also replaced two automatic resetting breakers with actual fuses that I could see if blown. That alone got rid of one code, then following this second diagram made the second code go away and got it out of limp mode. Hope my hard time getting this figured out and the help I received here helps anyone else that has an electrical nightmare from fusebox mayhem.