OK, here is what I'm looking at. Bear with me here, because I only know enough about electricity to be dangerous. But as you can see, I'm getting some type of current flow. With the meter set on the "DCV 200M" scale, (whatever that is), the reading is 0 with the leads touching nothing but the laminate flooring.
Then when I stick the leads into the yellow crap, it reads -112. So there has to be some type of current flow taking place. The bottom picture is the outside of the slider. The corrosion in the inside track, is right where the shower head of the sprinkling can is located. My electrical box is located right on the corner outside wall. The 2 junction boxes to the right of the hose bib are for telephone and Internet.
My power comes in by overhead wire. I have no idea what the elbow is coming out of the ground and into the house, right under the main breaker box.