Been lurking forever folks. This one hit home as I still run an old ap/pd and have repaired it too many times to mention. Once had to buy a pedal and another was a fried “pot” on main board. All parts were tested and obtained in burnsville at rapala/ minnkota/ etc… office-repair center although that was years ago. So no clue if they still exist there and in what capacity.
Now about 7 years back I had only clockwise rotation and no “left” after TONS of research I turned up this statement quoted below in the actual tech manual found online after days of monkeying around to no avail. Sure enough the brown wire had no continuity. I could have replaced the whole wire “loom” or coil from board at base to board at head, but just ran a wire taped all the way and presto no issues for over 7 years. This fix may not help you if yours is counterclockwise only. But this is the manual techs would use. So good luck and hope it helps.
Effects of Broken or Intermittent Wires in Coil Cords
¾ If either the yellow or green coil cord wires are broken or intermittent, the steering with the foot pedal will not
function or will be intermittent. AP function will not be affected in any way (the AP light will be lit when AP is
turned on and the motor will track and hold a heading in the normal AP manner).
¾ If the brown wire in the coil cord is broken or intermittent, the AP will not function. If the AP function was turned
on, it will turn off and the AP indicator will not be lit. Steering with the foot pedal will be clockwise only,
regardless if either the left or right side of the steering pedal is pressed.
¾ If either the white or small black coil cord wires are broken or intermittent, the steering function will be
inoperative or intermittent. The motor will not respond to the foot pedal, and the AP will not track a heading even
though the AP indicator light is lit.
¾ If the small red coil cord wire is broken or intermittent, the foot pedal steering will be inoperative or
intermittent. If the AP function was turned on, it will turn off and the AP indicator light will not be lit, and the AP
system will not function
He also said I could send in the pedal and they would test it to determine if the pedal is good or not. I sure hope the pin spreading works. I never thought to try working with the plug in. It started having problems after it had been plugged in for weeks and not doing anything different with the plug in, so I never thought to start there. There has been a run of poor luck around me lately. Hope this is the end of it for awhile. 
