re: Sprinkler help. Why does one section keep going on when the others do? Details below

Finding the valves is going to be the hassle. Hopefully they put the valves in valve boxes but you can start by taking a metal piece of rebar and going down the line putting it in the ground until you hit the lid hopefully. If you don't find it there, you can start at the water source and start poking around there.

You definitely have a wiring job that the past technician didn't want to jack with apparently.