[GreatPumpkin]

I thought I knew enough about electrical to deal with anything the AS could throw at me, but now I am absolutely perplexed.

There was a cable with a 3 prong male plug at my TT tongue. It was old and broken. I did not anticiapte needing it for anything, so I was planning on cutting it off and removing the wire (it runs under the belly skin to the rear). There were three wires attached - one ground to the frame, and two other wires. One was red and the other appeared to be white. Upon closer inspection I determined they were both red, one had just had sun fade so bad it was now white. Following me so far? Three wires, each attached to a prong on the plug. Now the confusing part. The two red wires (copper) were actually a splice into the original cable. It's a single ALUMINUM cable! I'm guessing about a #6 stranded? I traced the wire back and became even more confused. It (single cable) goes to the back where it enters the trunk. The cable at this end has a copper lug on it where it hooked to the battery via an add-on fuse block!

There was no battery when I bought the AS, I've since put one in, but obviously I did NOT hook up this contraption. I was a little confused as to why I had three wires that appeared to hook to the battery when I first looked back there. Now I know what the three wires are/were, but I'm still confused.

What in the world was this hookup? and what in the world would it do other than create a little 4th of July situation in the AS?