What does the computer cost which runs the charging system?
Alertnator was good on 2004 Mercury Sable

Had the altertnator replaced just to found out the computer which oversees the charging system might be bad?Dealer states
the original and replacement alternator burnt out due to this bad computer.What do you think?Is this possible?

Asked by for the 2004 Mercury Sable
main vehicle computer controls the alternator. computer will run around 650 plus labor and programming.