Cadillac Repair: 1991 Cadillac Eldorado - Reset A/C Compressor, cadillac eldorado, conversion instructions


Question
Having problems resetting the a/c compressoron a 1991 Cadillac Eldorado, 4.9 V8.  I'm converting R-12 to R-134, bought a kit from Advance Auto.  As you know, the manual states the compressor must be ON to charge refrigerant.  Of course the computer shuts it down.  The codes are as follows when I hold OFF and WARMER:

E046 HISTORY
B120 HISTORY
B121 HISTORY
B122 HISTORY
B446 HISTORY
B447 CURRENT
B552 HISTORY
R061 HISTORY

Could you lend a hand?  It's 100+ degrees where I am and I have 4 cans of R-134 just waiting!

Answer
Clear ALL the codes from the computer and jumper the AC relay to install the freon PROVIDED that you are only adding a can or 2 of freon. If you are refilling the whole system you have to evacuate all the air out of the system via a vacuum pump BEFORE you can add the freon and the small can of R-134 oil per the conversion instructions.