I just installed a 1990 Dodge Ram 120 amp alternator on my '71 Duster and it's not charging. The vehicle has been completely rewired with a Ron Francis harness. Previously on the vehicle was a dual field square back alternator. One of the field connections was grounded to the alternator case. Got 13.8 volts at idle. Since I have an electric fuel pump and electric fans I decided to upgrade. Instead of grounding one of the field wires as on the old square back alternator, I have one connected to a 12V switched source as the factory would have done for fear of burning out the alternator. Should I ground the second field wire?