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Bad alternator "fried" my battery

Tiny
MULLETBIKER
  • MEMBER
  • 2004 FORD F-250
  • V8
  • 4WD
  • AUTOMATIC
  • 138,000 MILES
I have a 2004 Ford Super-duty diesel. The alternator died & because of this, drained both batteries & truck died on the hi-way. Got towed to the dealership & was informed alternator was bad & needed to be replaced & 1 Battery was bad & needed to be replaced. Both batteries are less than 1 year old, but I was told the Motorcraft Warranty will not cover the battery, because the Alternator fried the battery. Does this sound right? Can a bad alternator "fry" a battery to the point where it can't be recharged?
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Monday, January 3rd, 2011 AT 3:42 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Well the term "fry" refeers to an ALT overcharging BATT and boiling electrolite out is this what they say happened?
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Monday, January 3rd, 2011 AT 7:02 PM
Tiny
MULLETBIKER
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  • 2 POSTS
Yes. I was told by the Ford dealership that the alternator stopped working & that it drained 1 of the batteries so much, that it was "fried" & would no longer hold a charge & because it was caused by the alternator it was not covered by the battery warranty.
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Monday, January 3rd, 2011 AT 7:34 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
That can happen low charge can depleat plates of electrons and cause failure
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Monday, January 3rd, 2011 AT 8:14 PM

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