I have a Fisher MM plow with the Insta-Act motor/pump. I use the fish-stick controller. The plow seemed to be fine until a few weeks ago. The first thing that happened it that the 12vdc relay to the Insta-Act motor/pump burnt out. I replaced that. The plow worked fine for a while. I have since removed and reinstalled the plow. The plow blade is not completely locked up. It is full angled to the right and won’t lift or angle left. When I press the controller buttons I can hear the motor kick on. It shakes and the light dim but the blade does not move at all. I can not manually move the blade to angle left. Almost like the hydraulics are bound. Any idea what the problem could be?