I have 9 spray zones and 3 zones do not work using the control panel. I can turn on the sprinklers manually by flipping the lever by the valve. I decided to swap out the solenoids - Weathermatic S20P solenoids... and made sure wires were getting electricity. Shocked myself several times while doing this. Once solenoids were swapped out, only 1 of the 3 zones is operational using the control panel. I'm stumped. What should I try next?
Voltage doesn't mean anything except that there is some continuity. "Some" is not good enough - resistance testing will show what you have for continuity.
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Of course you can swap solenoids around, and bring one directly to the controller to see if it will actuate, but pros exercise due diligence and perform needed electrical testing.