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battery light comes on 

 

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 Post subject: battery light comes on
Posted: Wed Apr 12, 2006 5:07 pm 
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hey everyone...i have an EA fairmont Ghia 5 speed and when i plant the foot down and when the tacho reaches about 4500 rpm the battery light comes on....its come on in 1st, 2ns and sometimes 3rd if i have my foot on long enough

I dont know whats the issue

Thanks

Ryan

 

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Posted: Wed Apr 12, 2006 6:29 pm 
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Haha, built in shift-light.
I was going to say alternator when I read the thread title, but that's seriously weird dude. Sorry, can't help.

 

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Posted: Wed Apr 12, 2006 6:31 pm 
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Is the belt slipping on the alternator at high rpm?

 

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Posted: Wed Apr 12, 2006 7:42 pm 
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sounds like alternator problem to me, but usually the light would come on at idle, and then go out at high rpm.
check to see it's charging using a multimeter.

 

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Posted: Thu Apr 13, 2006 12:07 am 
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had the same prob with my dads eb, was belt slip you couldn't hear it tho
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Posted: Sun Apr 16, 2006 5:33 pm 
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Voltage regulator in the alternator. The alternator output is engine speed dependent, but is limited to about 14V by the regulator when engine speed increases.
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