Sounds like the solenoid is getting constant power on the control wire. This is most likely due to the solenoid being shorted internally. If it were me, I would return that solenoid and have them provide another.
Basically the way this works is when you supply one side of the solenoid with battery voltage and then the trigger wire is supplied 12 volts with the ignition switch, the solenoid supplies battery voltage to the starter. So if it is getting that voltage all the time then it is shorted.
The only other thing is to make sure you have the wires connected properly. Here is a video showing how to do this on another solenoid. If you have voltage going straight to the starter side of the solenoid then it will have power all the time.
https://youtu.be/Y56wVWLvhvU
Let me know if you have questions on this. Thanks
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Wednesday, March 31st, 2021 AT 2:45 PM