Hey Guys,
I have a SMB pinball machine and my left key light doesn't work. I put my multimeter on the ground braid and each set of wires on the left key, the red-red-grey wire is getting power, but the red-red-yellow wire isn't. I think this is normal however because other lights are getting the same reading that work. I don't think it's a socket issue, but could the neutral wire be disconnected somewhere? Also, the other key lights only have one set of wires going to them.