Scooter,
No the bad connection I had was on the far left plug. that plug has the height limit switches and control for speed limits. The code 57 I was getting was due to a bad F13 fuse. I would get battery volts on top of fuse then it would have a 0.08 - 0.10 volt drop. So minor that I did not notice it at first. I had to check again to make sure I was seeing it right.
Hope this helps..
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