Activating Hydraulic jack blows fuse and stops extending

You can also ohm out the coil in the solenoid and compare it to a good solenoid. I can help you over the phone or maybe you can find electrical person to help you. There should be a specific ohmic value when you measure between the two leads that go into the solenoid. I have been a professional electrical electronic troubleshooter all my Life and I also suspect it’s the solenoid as well.