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Charging System on '80

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Old Aug 14, 2002 | 04:12 PM
  #1  
Tonwoo28's Avatar
Tonwoo28
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From: Brandon FL
Default Charging System on '80

Just replaced the battery on my '80. My old battery was only in the car for 3 months. The car was last driven about a week prior to the battery going dead. Took it in, and it tested bad with a voltage of only 2.5 volts. With the old battery my charging guage read around 15/16 volts. The new one now reads 12 volts. Also, when letting my windows down, there's about a 4 volts drain on the system. Alternator?

Thanks,

TonWoo
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Old Aug 14, 2002 | 04:57 PM
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LAvetteman
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From: South Central Louisiana
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Default Re: Charging System on '80 (Tonwoo28)

Check your voltage at the battery with a volt/ohm meter. I wouldn't trust the volt gauge half as far as it can be thrown, actually fly's quite well. :lol:

You need at least 13 volts with engine running
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Old Aug 14, 2002 | 05:24 PM
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FeedVaal
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From: Tulsa Ok
Default Re: Charging System on '80 (71,454,4spd)

I just changed out my ALT last night under an umbrella with sheets of rain falling. I hope the weather is nicer there cause it sounds like its time for you to do the same. :smash:
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Old Aug 15, 2002 | 02:44 PM
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From: Brandon FL
Default Re: Charging System on '80 (71,454,4spd)

It reads 12 volts at the battery. I'm having the alternator checked today.
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Old Aug 15, 2002 | 02:45 PM
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Default Re: Charging System on '80 (FeedVaal)

I'll give it a shot.

Thanks
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Old Aug 15, 2002 | 04:09 PM
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From: Coming home from Luckenbach Texas
Default Re: Charging System on '80 (Tonwoo28)

Also make sure all charging system connections are clean and tight. This can cause similar problems.
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