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My 1977 Datsun 620 longbed.


Datsun620longbed

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The body should have a ground wire to it anyway. The external voltage regulator MUST be grounded either way. To the body or the battery.

 

The alt should also have a Black ground wire going to the case body. The output from the alternator (it's an insulatdr terminal on the case) goes to the positive side of battery.

 

I'm pretty sure I have all those wires but I'll look and see when I get a chance, but I had my friend look at it and he is going to see how much it would cost me to have his shop by pass the external VR and go to a stronger internally regulated alt.

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