Mystery box investigation
Well I did some investigating and tore into the box. It was definitely a PO's handywork. Under the box I found a small black tank (pic#1) with a hose coming out of it. I have not yet traced the hose, but it does not look that old. There is still visible fresh Teflon tape on the fittings. It is strapped to the frame. I did trace a hose that exited the front of the trailer clsoe to the discovered tank, but I believe this to be remnants of an old vacuum style brake control (pic #2).
Have no idea what it may be. Fresh water surge tank? Air tank? Anyways, I got a good look at the frame through the hole and it looks good! It is good to find a positive thing! I have found some major electrical problems, which are starting to concern me. To think the fun has only started!
Thanks for the help!