How can I turn on my outdoor water fountain?
In my experience (since the prior owner is not being helpful) there's probably an outlet someplace that this just plugs into. Should be outside, have an &quot;in use cover,&quot; and should be GFCI protected (preferably by a GFCI located inside,) but none of those may be true, or all of them may be.
And in all likelihood, the wiring is not remotely up to code - All too common to see an extension cord just barely below the surface of the grass, or running through a flowerbed. So, grab a trowel and follow that wire. I'll be shocked if you actually need a shovel (implying proper burial depth, though wrong type of wire is still a strong possibility.)