Dometic WH-6GEA does not work on electric alone

The electrical switch supplies power (no ope circuit). The gas switch supplies power ( no open circuit) everything has power till the 6 pin connector is plugged in. It is actually more of a sign of a ground fault through the board but can’t find where it’s going. I’ve tried 3 different boards and all have the same issues. All the wires, let me say that again, all the wires have the power they are supposed to have with the 6 pin unplugged