5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

charging issues

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Old 06-09-2007, 07:03 PM
  #1  
w8less
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Default charging issues

i can't figure it out.

ok brand new battery new terminal ends and the alt tested fine. why does the battery light keep coming on?

when i am driving it comes on but when i am idling it shuts off
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Old 06-09-2007, 08:48 PM
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blkonblk5.0
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Default RE: charging issues

are you actually losing power or does the warninglight just come on?
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Old 06-09-2007, 10:06 PM
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w8less
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Default RE: charging issues

light just comes on i can't figure it out for nothing any ideas?
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Old 06-09-2007, 10:52 PM
  #4  
white93pony
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Default RE: charging issues

does it come on when you rev the engine
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Old 06-09-2007, 10:56 PM
  #5  
tmajikman
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Default RE: charging issues

maybe the voltage regulator is overcharging, making the light come on when you rev the engine up. Check that, it is a free item to try.
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Old 06-10-2007, 12:07 AM
  #6  
PRO50SC
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Default RE: charging issues

It's internal in the alt. I had the same issue, sent it back to PA Performance,(warranty) they rebuilt it, problem solved.
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Old 06-10-2007, 12:29 AM
  #7  
tmajikman
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Default RE: charging issues

ORIGINAL: PRO50SC

It's internal in the alt. I had the same issue, sent it back to PA Performance,(warranty) they rebuilt it, problem solved.
so it is not the regulator, sorry for the bad info.
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Old 06-10-2007, 02:21 AM
  #8  
w8less
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Default RE: charging issues

its on my moms van just trying to get some info
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Old 06-10-2007, 06:58 AM
  #9  
Blckstng93
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Default RE: charging issues

Did it do this with the old battery and terminals? Doublecheck your connections and make sure theyre all tight.


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