Parasitic Draw from ECU-B no 3 issue

I have a parasitic draw on my 2016 and I’ve got it narrowed down to the the ECU-B no 3 fuse, and have further found removing the harness behind the instrument cluster to likely be the cause. I’m struggling to find what systems are linked within this harness to try and narrow it down further, can anyone help out?

 

see attached
c9 is the connector pinout

 

Thank you!

 

I have the same problem did you end up figuring it out????

 

I have not gotten to the bottom of it. It's too damn hot out right now to be sitting and probing, so I just keep the truck hooked up to a battery tender when I know I'm not gonna drive it for a few days. Once it starts cooling off here I'll spend a weekend with a buddy who is more electrically inclined than I am and try and solve it.