Car wiring diagrams: 3G Alternator Conversion Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. The installation of this kit deal with direct battery power, this step cannot be skipped. If the G Alternator is already installed on the vehicle, it may need to be . wire in a g atly off a mustang. do you have a wiring diagram for this alternator into a fox? and do i need a wire coming from the battery .The old wiring harness contains one yellow white wire that is the one for one swap with a Mustang G alternator, that may not apply..