Sprikler no go all zones

I have measured voltage on zone - about 30 V I have measured coil resistance - OPEN (!) (should be over 20 ohms minimum )
I have short at “rain gauge input” .
I have turn “rain gauge off”
I suspect open ground since NONE of the zones work.
Yes , I have water…

is sprinkler AC GROUND actually connected to physical ground somewhere ? or should it be ?