Dometic RM2652 no power to upper control board

Doug, let me ask this. How does the board remove the voltage from the reignitor but not the gas valve? Is there another wire that ends up feeding the gas valve 12v? Because the yellow wire that comes out of the board with the 12v goes to the gas valve then another yellow wire comes out of that same gas valve connector up to the reignitor. I am just trying to understand how it works. Thanks