Those old solenoids are almost always bad, and Warn no longer carries them. Finding new ones is difficult to impossible. For my 8274 rebuild, I ended up getting a new solenoid pack from Warn.
I had a Warn/Belleview predecessor to the 8274. Almost every part was available through NAPA. The solenoids I believe cross reference to Ford solenoids. My CJ7 used the same solenoid as the winch did.