Cadillac Repair: a/c, electrical schematics, cadillac sedan deville

Question
I have a 1996 Cadillac Sedan Deville 4.6 Norstar. after putting in a/c. It didn't want to come on, keep building up pressure when I try to charge system. I did pump vacume.I was told that a/c may be locked.If so is their a way to check and unlock system.

Answer
Does the AC compressor RUN at all ?.  If you jumper the AC relay does the AC compressor engage ?.

You will need, If necessary, Electrical schematics and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture.  I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.