1. Polarize generator. With engine not running, momentarily jumper the 2 terminals on the cut out.
2. If it still will not charge, ground the F post on the generator. If that makes it charge check wiring back through the charge control switch
3. If no charge with field grounded, jumper across the cutout. If still no charge you likely have a generator problem or wiring/ground problem. If it charges you have a cutout not working.