PNDB or WTF?

I know that it was discussed dozen times and I have brake my eyes to try find close answers BUT....let me ask plz
My freaking Freightliner Cascadia 2017 365k,still under warranty, shuts off and on off and on today, took it to stealership in Walton KY and end up with $380 for diagnostics of nothing also theirs original "sorry". Told them PNDB and etc, but they as usually just followed their "HOW TO DO zombie-diagnostic" instructions. Welllll, the problem is NOT solved and making me so sad especially this tough market days.
After I read all posts linked to my situation I confirm that : PNDB is not blinking as used to do when it is BAD, just solid red light, tapping on it, wiggling wires etc doesn't show any shuts off and on.
CLDB switch doesn't blinking as well, just solid red light. Only when I turned it to aux/off position, it blinks at AUX/OFF 2-3 times and red light turns off.
I have another PNDB2 above the battery box which do the same NOTHING suspicious.
What do you think/know about this? Keep blame PNDB or PNDB2 or Killer switch? Any ideas?
I would replace all of those but again, if no help from Freightliner stealership what do you want me to do? Please help to get back on road without shuts off on downhill curbs....witch is not fun.

 

Magic fuse box on firewall!

 

Appreciate your help and pics! I think i will replace it. It is another $340 part.

 

Thank you all!!! Just picked up my truck. They found a problem and fixed it under warranty with no charge! The same dealership but dayshift! It was all known PNDB. Appreciate y’all!

 

No, just told me that they have replaced it and that’s all. Yeap, Fyda at Walton KY