Thanks for responding to my post. The wire in question is wired into a connector that is plugged into the underside of the voltage regulator. The #4 relates to the pin numbering on the mating connector on the voltage regulator. The regulator end of the wire traces to a 4.7Kohm resistor that is mounted on a small PC board inside the regulator. The other end is terminated in a ring lug. I can not tell you if I have current on the wire. I will be finishing the wiring by the weekend and firing up the car and will check it then.