Rhinebeck01
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Aux negative is disconnected . Fused bypass jumper in use .. Aux battery is bypassed.Confused.
The fused bypass, barring no other changes to factory wiring on dual battery JLs, connects the two batteries in parallel at all times. Without the fused bypass those batteries are in parallel at nearly all times but cold cranks and ESS events(?)
But once you've disconnected the ESS negative cable that is connected to the Main battery negative terminal, in other words broken the electrical connection from the ESS battery's negative post to the Main battery's negative post, you've isolated the ESS battery. I would think then that any connection to the ESS battery's positive terminal only (a.k.a. the fused jumper connected to N1) would serve no purpose.
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