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10-29-2010, 08:32 PM
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#1 | |
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AF Newbie
Join Date: Oct 2010
Location: Chesterfield, Michigan
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car dies
I have a 99 gtp I am having trouble keeping the battery charged. I have replaced the alternator and battery, twice. I have a volt meter and the large terminal from the alternator only reads 8.5 vdc why am I getting such a low output? And how do I trouble shoot any further in the circuit?
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10-29-2010, 08:36 PM
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#2 | |
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AF Moderator
 
Join Date: Jan 2005
Location: El Paso, Texas
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Re: car dies
Welcome to AF.
Thats too low. What voltage do you have across the battery positive and negative terminals at idle?
__________________
'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines |
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10-29-2010, 08:39 PM
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#3 | |
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AF Newbie
Thread starter
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Re: car dies
I had between 13.7 and 14.5 vdc.
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10-29-2010, 08:42 PM
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#4 | |
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AF Newbie
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Re: car dies
Would belt slippage or possibly a weak tensioner itself be a reason for such low output?
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10-29-2010, 08:49 PM
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#5 | ||
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AF Moderator
Join Date: Jan 2005
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Re: car dies
Quote:
Have you checked for any battery drain or parasitic draw? Look for current in milliamperes from the battery negative cable to ground. Meter in series.
__________________
'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines |
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10-29-2010, 08:53 PM
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#6 | |
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AF Newbie
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Join Date: Oct 2010
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Re: car dies
I will have to check for any sort of draw. I greatly appreciate your help in this matter. And thank you for welcoming me in the community.
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