Join Date: Apr 2006
Location: Spokane, WA
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Sounds like the current flow is between the different batteries. I am assuming you have disconnected the batteries from everything else.
Next step is to disconnect the batteries, one at a time, from each other. FIRST REMOVE ALL JEWERLRY, EVEN THE WEDDING BAND. Measure your current draw while you disconnect them. You will find the problem child. It’s probably not a short, just a cell that’s weak or sulfated. Are your batteries wet or sealed? If wet, try and equalize them. If sealed, follow the batteries manufactures instructions.
Also if wet, you can measure the specific gravity of each cell. They should all be very close. You will probably find one that is low, that’s the problem one.
If they are sealed, you could also disconnect all from each other and measure the voltage of each battery after they have sat for 30 to 60 minutes. You will be measuring the open cell voltage. They should be reading all the same. The one that’s lower is the one with the bad cell. Hopefully you have a 4 ½ digit digital voltmeter (displays four digits) rather then an analog one. If not, see if you can borrow one. You will need that degree of accuracy.
Have patience and you will find the one that’s bad.