Sounds like a Clock issue. Try switching the infected zone wire from your clock to a different zone. If that doesn't work, if you have a dial to switch to a different type of watering menu such as daily or bi-weekly. try switching to that. If you determin that it is not the clock. Than check wiring connection at clock and at box. If there is a complete break in the line, most likely none of the zones would work. Therefore you shouldn't need to meter it. If all this fails, your Valve is mosy likely defective. Good Luck