To clarify to all, I connected in parallel. I used the wrong term. Sorry. 

The engine was off, so the Yandina should be off and not combining. That is why there is a problem.

I will have to check all the fuses. The previous owner jumped the fuse for the aux items such as radio, light, etc. instead of the fuse, a wire is sticking out of it and back into the opposite side of the fuse box. (Meant to bypass the key switch.) and ultimately connects to the wire into the relay in the aux battery box.

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> On Jul 3, 2015, at 5:22 PM, Neil N <musomuso@GMAIL.COM> wrote:
> 
> Jeremy
> 
>>> ..... I took some advice and bought 3 wheelchair batteries and linked
>>> in a series, so I have 12v and 66amps.
> 
> Along with Jim's comment, unless each battery is 4 Volts, you must
> mean that you've wired them in parallel. e.g. like this:
> 
> http://i1035.photobucket.com/albums/a440/klicky96/2x12VoltinParallel_zps4a2a43ba.gif
> 
>>> However, all done, and seemed correct,  went over and tinkered with the
>>> starter battery for a bit. Went back to the aux and noticed my isolator
>>> was not isolating. How do I know! I have a Yandina combined/isolator that
>>> has a light go on when combined.
> 
> Was the engine running? Shouldn't the Yandina combine the batteries
> when the engine is running?
> 
> 
>>> Here are some anomalies that occurred which may or may not have affected
>>> this.
>>> 
>>> 1. While connecting all the wires back to the batteries, which was quite
>>> difficult, I may have touch a ground or something because I heard a click
>>> or pop come from the fuse box.
> 
> Maybe there's a load at dash that comes on when you supply power to it?
> (connect aux. batteries)
> 
>>> I looked, but did not see anything obvious
>>> and did not pull every fuse to see what shorted. I figured I would wait to
>>> see what would not work. Everything seemed to work ( but not sure if the
>>> power was coming from aux or house or both)
> 
> I would suggest that you check all fuses first.
> Do you have two aux. battery systems?
> 
>>> 2. I was going to pull out the house battery and because of the tight fit,
>>> I hit the metal frame of the box and there were a lot of sparks, and even
>>> scarred my wrench. I aborted pulling the house battery, but all
>>> accessories still worked.
> 
> Assuming you accidentally connected ("hit") the battery + to the vehicle frame,
> what happened makes sense; there would've been no fuse between that
> + post and vehicle frame.
> 
> Neil.
> 
> 
> --
> Neil n
> 
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