Battery Question

I have not worked on Freightliners much but if you found 4 group 31 batteries I would say they are the ones you are looking for. Was this battery box behind the cab? You could follow the heavy red cable from your starter and that will lead you to them also.

 

Yes.If you have a truck with electric apu for a/c and heat it will have 8 batteries.4 behind cab and 4 more under left step for starting.most Columbias and Century models with only the 4 batteries have them mounted behind the cab between the frame.

 

napa battery part#7236.great batteries.been using them at my shop for 10 years.one of the last of the American made batteries.

 

Virtually all of the batteries sold in the US are US made. Just only a few outfit doing it. Deka / East Penn, Exide, and Johnson Controls. They make everything for everyone. Napa is made by Johnson Controls, who also makes Interstate. Deka makes everything from name brand batteries from O'Reilly's auto parts, AC Delco, to Caterpiller. I have lost track on Exide batteries, but I do remember the Sears brand are Exide. I used to haul a lot of batteries or battery components and it was amazing to see what brand labels were coming out on the completed end of things.

Surprisingly enough, I have had excellent results with "on sale" batteries at the OEM truck dealers! Have held up about as good as any name brand.

 

usually there are two positive wires and two negative wires from right and left battry banks, but.... they are bolted together negative to negative and positive to positive under hood and connection may be corroded.

If you cant start truck after sitting more two days cell in one battery is bad and one battery drain other, so disconnect all batteries and find faulty one with DVOM after truck sat for 3-5 days, but anyway it is recomended to change all four batteries

 

The new absorbed glass mat batteries work really well.They are designed to deep cycle and hold their charge.We use them in our trucks with the electric a/c's.They are more expensive but most have a 3 yr replacement warranty.We hardly ever pay for batteries anymore.

 

Id go with agm for everything. They handle being drained to far much better then "starter" batteries. They don't have as much CCA, but come on, you have 4 of them. If you use them for just starting, starter batts are fine. Most of us use our cigarette lighters for stuff, leave our gps plugged in, run lights etc. after the truck is off. These all put small drains on starter batts which is not what they are designed for. When the truck is off, is EVERYTHING powered by the aux bats for heating and cooling? If so starter batts would be ok, if not AGM will handle the small "hotel" loads better.