I have 12 zones and all work except 1. I was doing some tilling & found a black coated small wire (like the kind used on my irrigation) wrapped aroun the tines of my tiller. After that, one of my zones no longer works. The 2 places I tilled should not have been near where the main lines were burried so I don''t know how I got into the wires or if they really came from the irrigation. Anyway, now I have 1 zone which does not work. What is the best way to fix this situation. I really can't afford to hire a pro to come fix this. My husband & I could fix it IF we knew the best method.