1. Ground the F (field) on generator. If that makes it charge the regulator side of voltage regulator is bad
2. If still does not charge, leave ground on F and jumper A (armature) post on generator to BAT output on regulator. Be careful not to arc spark the threads on armature post. If that makes it charge then the cut out section of regulator is bad.
If it still does not charge, you have bypassed the regulator and have a generator or wiring problem.
A defective right out of the box new regulator seems be getting quite common.
You actually polarize the generator. Instructions that come with regulator usually suggest to polarize by momentarily shorting from regulator armature to Bat post. This is just a convenient way to touch hot battery voltage to the armature post, sending current through the field coils and polarizing the iron core pieces of the field coils of the generator.
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