[stellar]

I agree that there isn't much info to go on here. I suspect the (electronic device) is a battery isolator. It seems to be working and the problem is probably in the forward original wiring, but without a lot more to go on this is a guessing game. Time to look for battery drain and start pulling fuses.

[shook1]

Originally Posted by stellar

I agree that there isn't much info to go on here. I suspect the (electronic device) is a battery isolator. It seems to be working and the problem is probably in the forward original wiring, but without a lot more to go on this is a guessing game. Time to look for battery drain and start pulling fuses.

Can you explain how I can use a multi meter to check for the drain, while pulling fuses?

Thanks,
Luke

[Geoff]

Can you give us a drawing showing the batteries, isolating device, how/where the alt is connected etc.

[shook1]

Originally Posted by Geoff

Can you give us a drawing showing the batteries, isolating device, how/where the alt is connected etc.

I'm not sure why you are asking where the alternator is connected. It is a factory, stock connection. Nothing special there. Nothing changed from factory.

There is a cable that goes from the positive battery clamp under the hood, to the "isolator" mounted in the trunk, by the rear battery. There, a short cable that goes from the isolator to the positive post of the battery in the trunk. The negative side of the battery in the trunk is grounded to the body of the trunk.




[HOOD BATT]POS-->------------>-------->(ISOLATOR)--POS[BATT TRUNK]



I hope that clears it up for you

[Geoff]

A factory, stock set up does NOT include two batteries, with one in the trunk, so there IS something special there....

You keep talking about an 'isolator'. Could be many things: a switch, a relay, a large diode.
Which is why I asked for a diagram.....