Low voltage problem

hotrod swinger said

However, I didn’t disconnect the field wire from the alternator before performing the jumper test.

Did failing to disconnect the field wire invalidate the result?

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Most likely not. Essentially you applied 12v to both sides of the VR. So no current flow.

If it was an electronic version of the older style VR then who knows.


Just to be on the same page.


Your alternator is a single field wire type, regardless of square back or round back?