I got called out to a property yesterday that's 26 zones on 2 controllers (15 on 1, 11 on the other). They had a 2nd house built on the property a few months ago and had a 2nd septic system put in and when the installer did it, he managed to cut through 10 of the 11 zone wires on one side of the property. Looked through the wires and didn't see any common wire but went ahead and spliced them all back together anyway and can't get any of them to run. System was put in sometime in the early 80's and there's not a 6" valve box to be found so I think, break out the 521, find the valve that works, trace the common to a wire fault and dig, find a valve that doesn't work and repeat. Easy enough, right? Well, the 521 isn't working. No matter what wire I hook up to, I'm not getting null over the wire. If I go to one side, I'll get tone, go to the other side and it's null as far as you go. The ground is bone dry and I don't know if that might have something to do with it but I can't get it to work. Called Greenlee and they suggested wetting the area where the ground stake was and trying moving it around or adjusting the signal strenght but none of that seemed to work. If I can't trace this wire, I'm going to be digging down the zone wires until I start finding valves (probably 60 - 80') and I really don't want to so if any of you have some tricks you can suggest, I'm all ears.