When we purchased our house, the sprinklers were wired to a controller for the townhomes down the street. I then wired the sprinklers to our garage using recycled wire. Now, years later, the wires experienced enough voltage drop that it wouldn't fire the solenoids. I trenched a new path through the yard, and laid down conduit with new wires. The sprinklers are working again. And a new storage shed to keep outdoor-ish things outdoors appeared.