Can someone please confirm the AWG of the wires on a Williams System 9 that go from the transformer to GI INPUT on the power supply (the two yellow wires)? I noticed these two wires in the run are noticeably thicker gauge then the other wires in the run that go elsewhere. The printing on the wires is completely worn off these two and I need to splice onto them to lengthen them since a previous owner did some hack work on them. I cannot find any reference in the manual.

In addition to that, I am getting a new power supply for my machine. The 9-pin female GI connector is unmodified but the connector is brown and I'm sure the contact inside are heavily oxidized and dirty. I'd like to avoid replacing the connector if possible. My thought was to carefully remove the metal connectors from the nylon housing, apply some white vinegar to them with a Q-tip, maybe use an emery board, then blast the clean with electrical contact cleaner to remove any non-conductive buildup on the spots that will contact the male header pins on the new power supply board. Will using white vinegar as a weak acid effectively clean up these female contacts? Is using an emery board to sand the contacts a bad idea?

Thanks!

Ok thanks for the advice. I'll replace it. Pardon my ignorance here but which circled part number on the photo is the correct one? I know these connectors come in two different sizes. I want to make sure I order the right size for the power supply connector. I know it's 9-pin but what guage? Aside from part numbers I don't see any other indication in the manual regarding the specs on each connector.

Essentially is it .100 or .156 for the GI power supply connector?

Screenshot_20190913-131808 (resized).jpg

I got it, it's .156.

Thanks!