Originally Posted by PGreenSVT
Sorry but I am going to disagree with both of these guys. The positive battery cable goes from the driver side battery to the passenger side battery, and then on to the starter. If you think it distributes the load evenly next time your batteries run down and you need to jump it try jumping it from the driver side battery. You'll be there all day. Move the jumper cables to the passenger side battery and it'll fire right up. At least that's what happens with my truck.
Thats what I always thought too is that even though they are connected, one of them still draws more.
Originally Posted by southend
Same load, same draw, unless you have a bad cable, or oxidized/corroded connector.
Edit: or maybe a bad plate (dead cell) in one of the batteries. Imo
Sent from my SCH-I500
I was installing a brand new set when I posted this
hint my curiousity as to which battery draws more load.
The whole reason I ask is I am too cheap to buy two batteries when one is still testing way above its rating. My new battery has a lot more cranking amps than the one that I did not replace. I should have included this in the original post