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Not charging

(1990 Dodge Ramcharger)
in North Lima, OH on January 30, 2011
i have replaced the alternator new battery and the voltage regulater and it is still discharging this is a 1984 model.i had the old alternator checked and it tested ok but i replaced it anyway.when i turn on the lights and heater the amp meter goes to discharge.Ihave checked for broken wires and not found any .this really has me stumped.
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Popular Answer
on January 30, 2011
did you check the voltage to the back of the alt? it must be 12 volts all the time.
i would start there.

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on January 30, 2011
no i have not. what kind of tester do i need for checking that?
on January 30, 2011
a volt meter. you need 12 volts to the big fat wire on the back of the alternator.

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