What tests did you do before replacing the alternator(s)?
What was/were the alternator outputs at low and high revs/loads?
Did you do a drain test to check if something was staying live and flattening the battery?
Did you test the battery to make sure it is capable of holding the charge?
vaux
November 2009
I can answer this question...
Why won't the battery stay charged? Mazda 1990 626 MY name Mary. ?