The hum is definitely coming from the new regulator, and is present when the gen light is on. With the car running at operating temp here is what I measured:
Battery voltage 14.0(14.5 during warm up).
Terminal 3 reg 16.0(14.5 during warm up).
Also noticed that the gen light is on bright at idle now and goes out with some rpm. Does this mean the new regulator is no good?
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