I'm a clown. What I could peek at was misleading. The CCRM pigtail cannot be reversed, as it appeared to be. This was the best, most well-supported,
wrong theory I've ever come up with. It would have explained so much. Glad I left the 0.1% open for being unsure.
I did purchase a new CCRM. If my fuel pumps continue to not timeout, I'm going to replace the FPDM.