To all: I need help to diagnose the problem with the charging circuit on my 81 D. My ignition light stays on and my voltage meter indicated 11 volts and dropping. Since I have the original Ducellier alternator, I automatically assume that the alternator has gone bad and promptly ordered a replacement from PJ Grady. This morning after I replaced the alternator, the same problem remains. Now I am at a lost as to what's wrong. The problem with the ignition light started shortly after I have the A/C recharged with 2.5lbs of R-12 and now the A/C works beautifully. Could it be a defective replacement alternator? Thanks in advance for any info that can help solve the problem. Bill