Cadillac Repair: 97 Cadillac Eldorado check engine light on and lots of codes, cadillac eldorado, haynes book


Question
I bought a 97 Cadillac Eldorado that had been sitting for more than a year.  This car runs great I've done an oil change, put new tires on it, and cleaned it.  All fluid levels are toped off and transmission fluid doesn't smell burnt.  Two weeks after I had bought it I started having a problem with my car not starting in the morning.  It would say "Service Fuel System" and the engine would just crank.  I fallowed the information I found on this website and was able to identify the problem as a bad fuel pump relay.  I replaced it and everything was fine but now the check engine light is on.  I once again found this website valuable and was able to pull the codes.  I was wondering if you know where to I can find the explanation to these numbers; I haven't been able to find the codes in my Chilton book or my Haynes book.  My question is where do I find this info.  I called the dealer and they told me to bring it in.  They won't tell me over the phone.  Here are the codes if you can tell me what they mean I would greatly appreciate it, or if you could tell me where I could get the information.  Many thanks.  Codes: p0231, p404, p603, p1139, b552,b1312, b1341, c1236, c1241, c1255, c1282, c1737, c1738, c1760, c1761, c1783, c1785, b1552, b1556, b1558, b1970, b1971, b1982, b1983, b2470, b2471, b2473, b2550, b2119, b0856, b1983.  Many of these are history codes, I still want to know what they mean so I know what the car has been through.  Any info will be appreciated

Answer
You will need simple electrical schematics, Test procedures 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.