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Originally Posted by outro702

Thanks for your response David. Greatly appreciate it.

I'm ok with losing the ability to charge chassis battery from coach batteries as well as the aux start. Then, what would be the simplest way to stop the alternator from charging my coach batteries? I'm sorry but I'm so new to this and trying to figure things out on my own...

Thanks in advance,
Ryan

Find the relay controlled by the BIRD. On one of the wires connected to the control (small) terminals is an inline fuse. Remove that fuse. The battery banks can now NOT be connected together.