why my alternator keeps going bad on 1996 Ford Contour

well i put a alternator n the ford drove it for two days an the thing went bad so i put another one n an like n two days that one wasnt any good but be for i put them n i had them checked at auto zone n they said they both was good n they both went bad

by in Winnsboro, SC on September 24, 2012
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3 answers
ANSWER by , September 28, 2012
Have all wiring and fuses been checked? Do you FULLY charge the battery BEFORE running it with the 'new' alternator? Bad battery can cause alt. failure.
ANSWER by , September 24, 2012
are u buying new alternators or remans
ANSWER by , September 25, 2012
where are you buying your parts that might be the issue or poss bad battery