"If you do not have the manual or cannot figure out the number of zones

or the number of heads, I would contact a sprinkler contractor. I am
sure that they would stop out without charging you to give you a run
through.... it could be future business for them if you should need
service down the line. "

LOL, a sprinkler company is gonna show up to someone that calls out of
the blue and figure out how many zones an unknown system has, where
they are, which ones work, which ones dont't and give lessons for free?