This is topic High revs = low battery in forum Tech Talk at Northern California Ford Owners  .


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Posted by RioredGT (Member # 2300) on :
 
Noticed something unusual the other day. When my car gets up into the 5-6k RPM range the battery gauge dips to the low side. Also notice that my lights dim. The battery is only a few months old. Is this a sign of a weakening/bad alternator? Can it be anything else? Car is a 98 GT, pretty much stock besides exhaust mods.
 

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Posted by copcar (Member # 10113) on :
 
possible old belt causing slipage? bad tensioner or a wrong sized belt as well.

[ July 25, 2010, 12:59 AM: Message edited by: copcar ]
 

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Posted by Secnd2nun64 (Member # 1431) on :
 
Check the wires on the alt.
 

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Posted by BOOSTED92GT (Member # 8650) on :
 
on my 99 the batt light would come on around 5k and stay on steady. did it for a month and then the alt died.
 

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Posted by 94 N.C.F. GT (Member # 3946) on :
 
sounds like altenator going out but double check your wires
 

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Posted by RioredGT (Member # 2300) on :
 
Thanks for the tips. I will check up on the items mentioned. Are there any other signs to a bad alternator?
 

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Posted by Luke87GT (Member # 21) on :
 
I'm going through a similar issue... Most likely Alt is on the way out.
 

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