Underdash Harness bunt up

Lots of research to do before swapping out your harness. I'm not saying the swap isnt needed BUT it's not just a plug and play and be done with it. Make sure to get factory schematics. And factory schematics for your donor harness.
Google "Mad Bypass"
That will help id some of the problems with factory mopar wiring.
Not an easy job, only wanna do it once and get comfortable lol. Remove seats to make it easier.
Good luck.