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Old 06-23-2011, 02:49 PM
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testing GM internal regulated Alternators

I have replaced the diodes, rectifier bridge, brush holders, and regulator. The windings test out OK. I have looked at neumerous wiring diagrams to check the wiring, and it still does not charge????? I am building a 62 chev short box pick-up. Any ideas or direction will help thanks
Ed Z

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Old 06-23-2011, 03:09 PM
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Quote:
Originally Posted by Ed Zilkowsky
I have replaced the diodes, rectifier bridge, brush holders, and regulator. The windings test out OK. I have looked at neumerous wiring diagrams to check the wiring, and it still does not charge????? I am building a 62 chev short box pick-up. Any ideas or direction will help thanks
Ed Z
Do you have wire #1 from the plug connected to the idiot light on the dash? Have you converted it to a one-wire regulator?
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Old 06-23-2011, 04:12 PM
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You can quickly test the alternator a couple different ways. Temporarily feed battery voltage to all three terminals, (the large stud and both small terminals), It should charge, if not and it is in fact grounded, then the alternator is defective. You can also test the regulator on the car, there is a small d shaped hole on the back of the alternator that has a tab from the regulator in it. If you short that tab to ground (alternator case)it will effectively full field the alternator. If it works with the tab shorted the regulator is no good.
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Last edited by T-bucket23; 06-23-2011 at 04:19 PM.
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