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The proper way to check the alternator, would be best if you remove it and take it to your nearest auto parts store. Most of them test them for free. As far as outside controllers?I'm not a mechanic but as far as I understand it there are no controllers as the alternator is always running, providing power to the distributor, charging the battery and running all the electrics on the vehicle. The battery is only used to start the vehicle, run the non-ignition eletrics when the vehicle is off and to keep the engine running when the alternator fails. Please correct me if I'm wrong!

Auto parts store to check to see if the alternator puts enough power out to keep battery charged.

*A way to check if the alternator is good is to un-hook the positive battery cable while the engine is running. If the engine stalls the Alternator is bad.**

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15y ago

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