2007 Freightliner Columbia with a 60 series Shutting down, stumped!

Mine was the cable from batteries to the frame. The post is as rotted away I put a wrench on it and it broke off as soon as I tried to turn it

 

Mine was the ground cable from the batteries to the frame. The post was rotted rusted. I put a wrench on it broke in two when I tried to turn the nut

 

I had intermittent shutdown w/o codes. It was a broken wire to coolant sensor on tank. Spliced new pigtail plug ( about 10 “ wire w/ plug)

 

giving your gauges(assuming speedo and tach at minimum) quitting is associated(sounds like), shutting down, and no codes. possibly could be a chassis/body module issue, I never worked on a Colombia, but the M2's have a BHM mounted to d/s firewall, and a few PDM's that tend to burn up terminals. the fact that the gauges act as they do, would suggest all those sensors, batteries, or Baro weren't an issue. sure there are no codes on the truck at all? suggest load testing (with a Loadpro or sealed beam) ign feed circuit(s) into engine ECM and Chassis or Body module and ground side as well. I just watched a video on this truck, does it have a body control module behind washer reservoir?