Freightliner keeps shutting off

I’ve had Columbia’s for quite a while and the problems I’ve had is the sending unit on the antifreeze overflow bottle on the firewall even though the bottles full it will still shut the engine off what I’ve done is unplug the sensor and bend a paper clip to go between the connectors on the wire end and tape it up a mechanic showed me that it’s always worked fo me in fact I took mine in to have a new sending unit put in the bottle and it still didn’t work so that mechanic put the paper clip back in. Lol

 

The only other thing I can think of is the wiring behind the motor inside the doghouse above the trans gets corroded a real pain to get to

 

I’m sure you checked for a fuel problem and didn’t find any, I’m not trying to be smart but sometimes it’s the simplest things we all overlook, I’ve done it myself, maybe you have a bad relay somewhere that’s cutting power, I worked at a Freightliner dealer for awhile and some crazy things happen then I smack myself for not finding it sooner

 

I’m just trying to help , trying to give you some ideas of problems I’ve had hope you can find and fix it , good luck to ya