Dead batteries after less then 10 hours sitting

You have a bad battery. Are you hook to a reefer? If so you can charge them off the reefer, till you can get it replaced. But get it replaced, asap.

BTW I've been home 6 days in the winter and the batteries still were fully charged.

 

the freight shaker i used to drive had a built in fridge. the power would shut off after a certain level was reached so there would still be enough juice to start the truck. have that system (the fridge) checked to make sure it IS cutting off the power when it's supposed to. that is of course, if you have the 'built in" fridge.......i think its some kind of "relay(?)" that goes bad. and if you're is not the built in, like i'd like to surmise, then YES a plug in fridge CAN use up a lot of juice, if that ain't working right.

a simple cell test as well as a load test can confirm a bad battery

 

Have you checked your alternator gage on the dash?

 

How old are the batteries? What shape are they in?
Mine were 3yrs old and were self-discharging on their own, even when disconnected. I ended up getting 4 new batteries. The KW dealer had the best price of anyone (ironically)...$74 each for 925CCA. Had to replace a few intermediate cables that were too slimed to clean. Now she can sit more than 2 weeks (longest so far yet) and no issues... (yea I know my cases are cracked...dont have the $295 for a new KW case right now)

PS. Winter's coming....If your gonna replace them - hit it before the snow flies

 

My thinking is too get them replaced soon as you can, why , becuse you dont , your placing a hard time on starting system too , its all ties together in a big loop, but sounds like a bad cell in a battery, mayby you can buy a auto start those 12 volt models at wwallmart till you get back too shop, save a couple hundred on a jump mayby that will work, mayby not , but worth a shot, i be like said too looking at all cables too clear too starter,like told my ex , you have a computer car now, cause she wondering why her battery went dead, well gee it was 3 years old, and a very bear too replace, it was one those cars were its sits inside the left fenderwell and you take out the fenderwell, but as i told her , your car is not complety dead , for your car is always on too power up things like door locks , that nice light for key when gets near it, stuff like and i think the new 18 wheelers with computers are like that too, myself i would go too parts house and buy a reg amp gauge some number ten wire and bunch of crimp termianls and tool and then wacth the gauge , sounds like too me the alt has a bad diode in it and would show on this gauge as not charging, just my thoughts Everett.

 

You can do an alternator check to make sure that is good. Start Your truck look at the volt gauge and note where it is (12-14), Now disconnect the negative wire from the battery, Check volt gauge again. Now turn on everything that draws power, A/C, lights all of them, radio and so on.

Your Volt gauge shouldn't drop under 10 nor should your truck die. If either one does happen. You have a bad alternator. This will look good with batteries hooked up and when running, But will still kill a battery.

 

Does this work with an Alternator?
I thought it required power to make power....so disconnecting the battery would cause the alternator to stop producting power - maybe?
Old school generators I know would produce power w/o having a battery attached....

My batteries show 12.3v and when the engine is on, they show 13.8 steady.

 

If maintenance isn't going to replace them just wait. After PAYING to get jumped by the shop at the truck stop or by wrecker I'll bet you a dime to a donut that they fall all over themselves getting you new batteries! Don't even ask for a jump! They will expect you to keep doing "work" for free! Screw them!
Now I would suggest that you unplug the inverters and anything else in the truck for at least 10 hours! Nothing should be plugged in not even a DC powered alarm clock! Have no cells being charged. No laptop no nothing draining power. Start the truck up and let it charge fully then shut it down. don't touch the brake don't turn on a light inside or out. no cigarette lighter pushed in nothing on at all and go to sleep and see what happens the next morning.
If dead then call the company, tell them to give you a PO# and a com check as you ned a jump.
If they aren't dead then the next night leave 1 of those inverters on. If it starts then the next night the other and so on until you figure out how many things will kill the batteries and drop down on the power usage.
A refrigerator will suck a battery dry pretty fast. If you must have it on them disconnect the rest and work from there.
It is getting cold so all the above can change as the temps drop! But this should guide you a little!
Stay warm!