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Originally Posted by Kip Amore
I was able to determine that the car isn't charging. Battery is brand new, alternator is new, wiring is fine and even though it's the third alternator in 4 months, the car had been running just fine for a month or so. Voltage regulator is also brand new.
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The fact that you have purchased three alternators within the past four months needs some investigation. Where were these purchased from and was it possible for the seller to confirm that the alternator was not functional when it was returned? Are you quite sure that the alternator has failed each time? Is is possible that the voltage regulator has failed and the
alternator(s) are still functional?
The likelihood of three bad alternators within four months is remote. It is far more likely that you have a problem with the regulator(s) and/or a problem with the grounds. As was previously stated, follow the cable from the battery to the grounding point and be absolutely sure that there is no corrosion there.
Do you have charging data when each of these alternator/regulator combos was installed? Is this data within acceptable limits (13.5V above 2000 rpm)?