Alternator failed again...
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Joined: Nov 2003
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Alternator failed again...
1996 F250 460.
My battery light came on and the alt gauge dropped down to 9 volts. I replaced the alternator and it worked for about 60 minutes. Battery light came back on and gauge dropped to 9 volts again.
All connections are good, grounds are good. There is a little black stuff coming out the front holes on the alternator.
Do you think the new part is bad too, or could something be killing it?
My battery light came on and the alt gauge dropped down to 9 volts. I replaced the alternator and it worked for about 60 minutes. Battery light came back on and gauge dropped to 9 volts again.
All connections are good, grounds are good. There is a little black stuff coming out the front holes on the alternator.
Do you think the new part is bad too, or could something be killing it?
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New User
Joined: Nov 2003
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Battery was fully charged, grounds are good. The last alternator was there for 8 years. I am hoping it was just another high quality unit from autozone. Everything I get from there takes at least 2 trips.
Senior User
Joined: Jun 2011
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From: Milford, CT
Also make sure your poles are right (+ to +). That would fry your diodes real quick, but I would vote it's the autozone quality. And if you have a 2G, might just want to go ahead and to the 3G swap.
-Mike
-Mike
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From: Cleveland, TN
Just two trips? Dang, you have better luck with their cheap junk than most...
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
Dead battery kills an alt?
Alternators job/function is to create power charge/maintain the charge of a battery/ies, having dead or severely low battery or batteries will not kill one unless of course it was junk to start with.
If it could/would do so? Heck I'd have killed the alt in my plow truck 100 times + by now easy. Screw up leave switching valves set to rear, power supply not routed through key.
Well that and everyone ever needed a jump......
Alternators job/function is to create power charge/maintain the charge of a battery/ies, having dead or severely low battery or batteries will not kill one unless of course it was junk to start with.
If it could/would do so? Heck I'd have killed the alt in my plow truck 100 times + by now easy. Screw up leave switching valves set to rear, power supply not routed through key.
Well that and everyone ever needed a jump......
Senior User
Joined: Jun 2011
Posts: 382
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From: Milford, CT
Severely discharged batteries (like, 8v) can (I stress can) overload the regulator and kill the diodes (depending on the ratings(quality) of the diodes). Many people who need a jump aren't low enough to kill and alt. I see it more often an boats than cars.
-Mike
-Mike
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