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Withdraw Question on pwr. dist. diag. Z-19

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Fred Klein

Joined: 26 Mar 2012
Posts: 503

Posted: Thu Oct 10, 2013 6:33 pm Post subject: Withdraw Question on pwr. dist. diag. Z-19

Bob...question withdrawn, as I more carefully review the diagram...Fred



Bob,



On Z-19, I note that the dual batteries are connected in parallel via a brass strap and via grounds which both go to the PNL; one feeds a "Main Battery Bus"; the other feeds the "Engine Battery Bus"; the ECU and fuel pump are fed from both busses via "Engine Primary" and "Engine Secondary" switches and diode bridges.



What I don't understand is why, since the dual batteries are connected, are 2 busses necessary?...Why not just one bus being fed off either of the 2 batteries?...is there a battery failure mode with dual batteries which would preclude drawing current from the good battery thru the failed battery?



Fred

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