Pre 84 Trucks 1st gen pickups

alternator charging problems on 80 yota

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Old Mar 21, 2011 | 10:40 AM
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boochie's Avatar
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alternator charging problems on 80 yota

hey guys i need some ideas on what possibly might be my problem here. i have a 1980 toyota pickup with a 20r in it. i have a new alternator and i replaced the voltage regulator. any ideas on whats happening?
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Old Mar 21, 2011 | 10:46 AM
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From: Renton, WA
what are the symptoms? whats the problems?

why did you replace the alt and voltage reg??
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Old Mar 21, 2011 | 11:25 AM
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My alt isnt charging my battery so i thought it went out. went and got it checked and its charging 14 volts. my regulator had some bad wires so i replaced the whole thing. it still isnt wanting to charge my battery.
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Old Mar 21, 2011 | 08:50 PM
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From: Tigard, OR
Are you sure you got the right alternator?

'81's and I'm assuming 80's as well originally didn't have a voltage regulator in the alternator (hence the external regulator).

I had a similar issue but found that the alternator was for an '86, and had an internal voltage regulator. I ended up having to use the connector from the external voltage regulator as a splice to charge the battery, bypassing the external regulator.
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