Flickering or pulstating Headlights

I mean the field connection that goes to the regulator. One field will be connected to the battery and one will be connected to the regulator field (F) connection. Remove the wire (green wire) that goes to the field, verify that you have removed the correct wire by measuring the voltage at the other field connection with the Ignition on. When you ground the field connection that you removed the wire from the alternator should charge at full charge. Check to make sure that the lights are not flickering when you rev the engine. If they are still flickering then I would look at the Ignition switch or bulkhead connections (if you are sure that the regulator has a good ground). By the way do not leave the alternator at full charge for a long time.