Quoted from Bowmallyboy:
I traced the white and green wire it all seems good with the meter it all works till the board with the pardon my ignorance the board with a block all the connections test fine. The plugs are fine and not burned or corroded. They seem to stop here. They don't seem to continue to the main board but when I test the wires from this up to the board they work?
Double check your white/green wire to the interconnect board (left wall inside head), and then from the interconnect board to the 3J8 plug on the power supply board. Make sure you have continuity.
1 - should run to the GI strand on the backbox insert board. 2 - should run to the supply supply board, connector 3J8 pin 8
Side note, are you missing half of the lights on the very top light light board that illumated half of the space station logo?