This is the OP: I know that you have to change-out all of the house batteries even if only one or two are shot. I do understand that all of them will need to be replaced simultaneously. But what about the chassis batteries? If I find that the house batteries are shot, are the chassis batteries considered to be part of the same system in the sense that they, too, would have to be replaced at the same time if I'm replacing the house batteries? Or are they considered to be a completely separate system. My understanding is that ALL batteries, regardless of whether they are house or chassis, have to be replaced if even one house battery is shot? Am I correct?
