Quoted from djreddog:The pic showing mostly white wires is where I tried to test the white wire on the shooter switch but couldn't detect a beep on any of the slots on the connector in the picture.
Those connectors suck. They gave me many headaches when I was working on my Black Knight. A lot of my problems went away when I put new plugs on all the wires to the mpu. Some of the problems were switches would register in switch test but not in a real game. Try poking through insulation on the wire when testing or touch the end of the wire where it comes through the plug.