You ran switched 12V to one (either one)of the alt field terminals and are T'ing in this wire over to the top terminal of the reg. A seperate wire from the side VR terminal to the other alt field terminal? VR has a good ground? No go; w key "on" check for voltage at each of these connections and each one should have fire. VR may be bad. Also check the brushes and holders in the alt. holler back.