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Old April 9th, 2021, 02:50 AM
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Dano64 Dano64 is offline
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Join Date: Jun 2017
Location: corvallis, oregon
Truck: 64 PU
Age: 52
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Default Re: Alternator troubleshooting voltage drain

Quote:
Originally Posted by James View Post
What are you measuring with your volt meter, can't tell from your pictures?

I found a very basic alternator circuit for your alternator. Can you tell me where you are measuring voltage?

Hey James.

I’m not sure I can do it with the diagram. It’s a new alternator with no external regulator and it has the two wire plug on it.


I have a battery charger on the truck right now so I get 15 V between battery positive and the heavy red charging lead off the alternator when the two wire plug is plugged in with the right side red wire connected to the battery post on the alternator and the white wire going to the generator light.

When I put the voltmeter back on in the same exact place with the red and white wires unplugged from the alternator, I get a voltage drop that shows initially about 5 V but quickly dropped down to less than half a volt.




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