Originally Posted by
hkstroud
If you have a meter you can just disconnect the wiring and check it for continuity.
If you don't have a meter, turn off the water, disconnect the wiring and water lines and remove it.
On your work bench.
Cut off the female end of an old extension cord. Put on a couple insulated alligator clips. Connect cord to valve using clips and briefly plug in cord. If valve works you will see and hear movement of the solenoid as you plug and unplug. You can do this without removing if you are careful and comfortable making the electrical connections with the clips.