One of the controllers for my garden sprinklers is spewing water. What's the best way to fix this? I've seen one You-tube video showing how to take it apart; looks like I could do it.

My second problem is worse. I've got water puddling on my lawn when I am hand watering. I believe the water spigot for my hose is connected to the pvc pipes under the lawn. Since I don't have a diagram of the layout of the pvc pipes for the lawn I'm not sure where to begin digging to find the leak.

Thanks,
Ginny