72 Swinger not charging battery

67Dart273 said

8V? What does it measure running? that could be the problem, very low voltage, may not be enough to "key" the VR into operation. I've no idea what that threshold might be.

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That's what it's supposed to measure, less than 12V. That's supplied by the VR. With the key off both fields terminals (with their respective VR wires connected) measure in the mv range. I'll get out there tomorrow before it hits 100 degrees working in my driveway. Got a different alt to swap in.