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Possibly a bad connection between the alternator and battrie. use a volt meter. put one lead on the possitive post of the battrie and one lead on the alternator b+ terminal. run the engine, put the fan on and lights on. the meter should not read above .02v roughly. if it does theres a problem with the cable or connections. do the same on the ground circuit. or use jupper cables between the alternator and battrie.

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Q: New battery and new alternator still charging at 8 amps?
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