I have an older Minn Kota trolling motor i just really cheap. Its an autopilot with foot control, no remote. The problem is that when i plug it in directly to the battery i only get side to side movement, and no thrust. Is this the foot control switch going bad or the board in the head? It has a white top that says "autopilot and the base reads 48# thrust and has a switch for autopilot on and off. I did notice that if i hit the pedal the blade turns just a few degrees. If i continuously hit it i can get it to make a full turn. Any help would be great.