Cadillac Repair: 1991 eldorado codes?, electrical schematics, laundry list

Question
Hi I recently acquired a 1991 eldorado. it runs kinda rough at idle and while accelerating. it had a laundry list of codes stored in it, so i reset all the codes and drove around for a while. here are the new codes that i got..ED47,B334,and B411 ..any ideas of where i should start in order to get it running good?

Answer
E047 = BCM to PCM communication problem between computers.

B334 = Loss of ECM (computer data).

B441 = Low battery voltage.


You will need to contact me at:


tomcjoy@msn.com


In order for me to provide you with pictures, Diagnostic procedures and electrical schematics to find and fix your problem since this board does not allow sending pictures.

PLEASE include your original question(s) and the MAKE-MODEL-YEAR and ENGINE SIZE of your vehicle when you contact me.

PLEASE tell me if you do your own repairs and or your skill level of auto repair. This is VERY VERY important if I am to be able to help you repair your own vehicle.


tom