Hi all!
I think this forum was offline, when I posted this info everywhere else. So here goes (sorry, if you already seen this).
Please, don't blame me for the piracy, copyrights and other, but I've scanned the S12 manual (1986 200SX S12). 785 pages in PDF-file + big and nice pic of the electrical diagram... The engines is CA18ET and CA20E, I guess. I have CA18ET, and the rest of the book was scanned to give to the other people. Like auto transmission - I've never heard of S12 with AT, but it's all in the manual.
So, if you need it - welcome to download:
http://www.yariksteel.ru/manual/s12/s12_manual.pdf - PDF Manual
http://www.yariksteel.ru/manual/s12/circuit%20diagram.gif - Electrical Circuit Diagram
Best regards,
Vitalik.