Check what dr pete said, but if you said just zone 4 stayed on, and now when thats disconnected zone 5 does it, then most likely you have something in the line. If your manifold has a cap on the end that screws out flush the manifold, after you clean the valves. I know on my installations i put a female adapter pluged with a threaded cap for expansion and flushing. Clean everything out, most likley there someting in there. (Unless your controller is bad?)
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers