Apologize for the lack of knowledge here. Does the green/red wire going to the regulator act like a relay? the green wire doesn't pass along the current from the yellow wire over to the black white wire does it? I thought the yellow wire provided the power to the regulator? so if that provides power to the regulator, what does the green/red do exactly? why is it called an excite wire? does the white black wire feed power to the regulator or does it feed power to the stator windings? What i can't tell from the diagrams is the direction or flow of electricity. I'm assuming the black orange FEED power to the battery when the engine is running, but the black orange wire has power available from the battery when the engine is off..correct? Your alternator testing procedures have you check those black orange wires for 12 volts when the engine is off and when the ignition is off. And the fusible link in that circuit is to protect the battery from over charging from the alternator? The yellow sense wire, also has power from the battery when engine off and ignition is off, but when the engine is running, its detects voltage drop and tells the regulator to increase or decrease the voltage or amps going to the battery. the fuse in the yellow wire circuit is there to protect the alternator batt feed wires from blowing out the regulator?