Marine/Dial Isolator Assaistance

Submitted: Sunday, Sep 25, 2011 at 19:12
ThreadID: 89238 Views:2376 Replies:1 FollowUps:1
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I have an old forerunner that has dual batteries fitted with the old marine type isolator (Black round dial with options of 1, 2, Both or off)

After running it this way for the last years, i finally got caught out and forgot to switch it to either 1 or 2 and left it in the both position - result flat batteries down on warren beach.

I am trying to decide on the gains of fitting a new electrical isolator (Hate all things electric - prefer old reliable mechanics)

Now for the help, I actually thought that when i switched the dial to either 1 or 2 that it was only this battery that was in use on the vehicle, ie if i moved it to 2 then only battery 2 was drained from the fridge/lights etc.

But I cannot see how this works, anyone out there able to assist with a description on how this old isolator works - it still works just me memory going.

Thanks in advance
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