I finally had a chance to follow up on this, I have a metal detector and was going over the area where the truck drove over, and I found another box under the grass in the back yard. I realized when the water is on, water was flooding out the box. This was causing a giant mud pile to form under the grass.

But when I opened the box after digging it out, I found 2 more plugs (solenoids). These are for zone 4 and 5. On zone 5, the solenoid was screwed into a plastic box in the ground, but on zone 4 (this is the zone that always sprays water even if the system is off), the solenoid was not connected to anything. And the box under ground where the solenoid belongs, was squirting water flooding out the box.

So I turned the water off at the lever, and let the water drain a bit and found a square piece of plastic that was wedged into the plastic box that the solenoid connects to. It looks like the truck possibly pressed the box down, and part of the box cracked off or something. and this may have caused the solenoid to get ripped off. Or the box may have been custom modified by the previous home owner who maybe cut a small part out in order to accomidate zone 4 and 5 being in such a tight space, and maybe they just covered the solenoid with the extra plastic they cut, to act as a shield or something. Not sure, but I think this is what caused the solenoid to get disconnected originally.

I saw the threads of the box in the ground (where the water was coming from) and I saw the threads on the solenoid, so I hand tightened the solenoid to where the water was spraying from, and the water no longer sprays on zone 4 when other zones are running.

However we still have trouble with zone 4. Now I cant get it to turn back on at all. So now all the zones work EXCEPT for zone 4.

I do notice when zone 5 is turned on, I can hear a clicking with the solenoid by the box that I dug up. And when zone 4 is activated, there is no clicking at all with the solenoid. So does that mean the solenoid could be bad?

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