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Old 05-19-2016, 07:51 AM   #1
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Isolator Question

Question for the (seemingly) infinite knowledge base:
Attached is a pic of the isolator on my 1997 SMB that is reletivly new to me. I accidentally left my fridge on which drained both my house and my starter battery. Can someone tell me what setting my isolator can be on? Not sure what "OFF", "S", and the other setting are referring to.
Thanks!

https://www.dropbox.com/s/bp1huydbf3...01.59.jpg?dl=0
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Old 05-19-2016, 11:43 AM   #2
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Not really sure what that is, not the usual SMB istalltion. It looks more like a hard switch to me, if you have a part number or something, maybe we can find out.

Most early (pre-2004) SMB were installed with a diode based isolator, after that they moved to "separator" Sure Power and then on top a Blue Sea ACR (automatic charging relay).

It is possible that this is a bypass switch for one of the above. You can monitor your voltage on both batteries and see what each setting does, this would be best done when you have a charge voltage present so that you could see the voltage difference.

-greg
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Old 05-19-2016, 03:33 PM   #3
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That really looks like a simple high amperage on / off switch. I would guess that the "S" position means "start" IE, if your start battery is dead, it's connects your house battery for emergency starting. I'd also guess there is some type of other combiner that charges your house battery. Try following the wires to see where they go.
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Old 05-19-2016, 03:40 PM   #4
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agree with the above. That is definitely not a 'standard' Sportsmobile item, but looks to be a manual switch to combine or separate batteries..
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Old 05-19-2016, 07:56 PM   #5
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Ok... good info... looks like it is time to get out the multimeter and do some sploring!
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Old 05-19-2016, 09:55 PM   #6
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If you drained both house and starting batteries the probability is high that the switch is connecting them together.
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