Sprinkler System Diagram Why Would A Sprinkler Zone Always Run Even When The Control Box Is In The Rest Position?

Why would a sprinkler zone always run even when the control box is in the rest position? - sprinkler system diagram

I have an old Rainbird irrigation system. All sectors seem to work fine except in my garden that is always running to. I put the water in and out of service because the configuration of the control box does not work! It works well, everywhere! I need to see a diagram or something. HELP PLEASE!