I spent most of today with a multi meter, printed pages from a few sites showing the wire colors and pinouts of the c500 block, a couple dozen test jumper wires with alligator clips on both sides. and wire cutter/strippers.
I cut the wires back to where they were copper colored and not black. Then I used the jumpers to connect the ones I knew for sure were correct.
The exterior lights as well as dash lights work. The engine started (still had to start it with a 12v jumper to the selonid it has never worked from the switch) and it ran smother than it had before, when it warmed the idle dropped like it was supposed to. Heater works fine (no ac compressor)
What did not work was any of the gauges nor idiot lights. The radio did not work but by supplying power to the radio fuse it did work. The alternator which I thought was bad because it was only showing 12.1 volts at most and the battery light would glow from dim to bright before now worked fine and showed 13.2 Volts. I have several wires I am bit sure about and lots of them seem to be green.
I an getting a c500 and one plug from parts car that tha driver has It is also an 86se auto. After I get it and get what I am sure about working and properly wired I will start working on the other things.
for not it is sitting with the battery out, but it could be made to run if needed for an emergency.
At one point I was so aggravated I started to sell it to a guy that ask about it and offered me $1000
I knew that it had wiring issues when I bought it, I just did not know how bad till I started repairing it.