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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