Please help with batteries dying.

If you had your batteries tested, and it's determined their bad, I'd not use the personal fridge, get back to the yard, and have them fix it in house. A reputable company would have no issues fixing it..the smaller ones want to do everything in house....they'll eat #### if you can't drive due to drained batteries.

 

So, you cut the truck off for 10, then can’t start, correct? And when the truck doesn’t start, what do you do? Find someone with cables?

Personally, I would idle the truck. Not playing the blame game. I wouldn’t say anything about any fridge, theirs or mine. FM. If the batteries are bad, you should begin to smell them. When that happens, expect them to swell and blow up. Just letting you know for when you hear the pop.

 

Your truck batteries, at least one of them, are weak. Since you mentioned your fridge, the company wants to blame it rather than the batteries.
Option 1: idle the truck so you don't need strong batteries until your company's shop can check/replace them.
Option 2: unplug your fridge when you spend a 10 hours out of it or restart the truck during your 10.

 

Start by shutting off the freightliner fridge, it is probably running constantly at 10 amps and will be draining 20% or more off the top. your #75 draws 8 amps while running and your #45 draws 8.5 amps while running. This is a stopgap until you get back to the yard and have your batteries load tested individually.

 

See what happens with the cables tight. You could easily have lost a volt or 2 because of that.

 

Depends. If you've discharged them too many times they'll be toast. Once or twice you can usually get away with it.