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Turn zone on, go to valve, disconnect wiring, check voltage from controller.
Should be 24v.
If not, you know you have a wiring problem.
" I've run a wire from controller station 1 to the field bundle,
bypassing the existing field wire for station 1. Nothing comes on." One control wire or control wire and common? If you only ran 1 wire you missed a step.
My guess: run wire from controller common to non working valves.
There may be a wiring fault in the common leading to the non-working valves.
The ohms readings on the field wires for the working zones and the common are very different (further right on the meter) than the others
All zones show about the same-about 20 ohms.
a working zone would show the solenoid resistance of about 20-to-50 ohms
Wet boots, have a multiple-meter but not sure I'm using it correctly. What readings should I expect?
Mr. Fixit, not lately. In the boxes I've opened, all the wires seem connected. I tried wiring around the ground (with ajump wire from the box) but then nothing worked.
Is the water turned on to the valves that don't work?
Since the valves are farther away from the controller than the valves that work it could easily be the ground wire. Check all the connections. Even at the valves that work.
Do any digging recently?
What are the results of your resistance tests of the zone wiring, that you made at the controller? You do have a multimeter, right?