I've slowly been rebuilding my 1995 Diamond plow to try to get it working. When I bought the F350 and plow, nothing was working. I've replaced all the coils (solenoids?) and the plow now goes up and down like new. The problem is it will only angle to the left, no matter if I put the controller to the right or left, it still just goes left. What could it be? I'm stumped!