I'm also not so sure the females have a slit in them. I was imagining what they should look like. I really don't remember now what they do look like.
And what Bill said. Seems to now be a bad ground. All the lights don't work? Seems to be something in common so what would that be? A ground.
And I also think you are making progress. It's just not the kind of progress you can show the wife yet. They expect the lights to work. We know the lights all not working is a positive sign. But the women don't get it. It's a guy thing.
Never memorize something you can look up.