I am working on a 12 zone system at a commercial building. On 4 of the zones, when one gets power, all 4 get power, but none of those 4 will activate the zone. The rest of the zones work fine. When I switch one of the none working zones to one on the controller that I know works, the same thing happens, (the 4 zones get power, but don't work). The valves are all good. For some reason on those 4, if you touch the ground wire you get shocked. I am unfamiliar with irrigation systems. We took over a contract that requires us to care for the irrigation system as well as the mowing, etc. I know basics about wiring. I have a crew that knows how to do repairs, but not wiring problems. How are the ground wires run? I'm thinking that when these 4 zones get activated that the pos is touching the neg somewhere. Any ideas on how to solve this problem? Thanks ahead of time for any help.