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Hi had a charging dust up on my '69 2002. Charging light came on - tested voltage at battery and wasn't charging, next I tested the regulator (jumped contacts) and it seemed faulty. I replaced with one i had in parts bin (had no idea how it got there...). Then tested voltage at battery and at idle had a good health 14volts, when rev'd however, the voltage dropped...curious. I then replaced the Alt with a known good one and put the old regulator back on, now it's all good, healthy volts at battery and rises with revs. it seems that the alternator was bad but regulator was good. any ideas? thanks, chuck

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Coupla random thoughts...

1.  old voltage regulator had stuck points; removing & replacing it unstuck 'em

 

2.  replacement regulator wasn't compatible with your original alternator:  '69s had 35 amp alts, later cars had 45.

 

3.  the heavy ground wire that runs from the alternator body to the block wasn't making good contact; swapping alts cleaned up the terminals.

 

4. diodes in the original alternator have died--test old alt at your local auto parts store and see what's wrong with it.

 

cheers

mike

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