ST4000 tiller autohelm wild over correction
Subject autohelm has worked perfectly on my 1977 Nich 31.
Saturday I turned it on and it went into a slalom.
Any guesses where to start looking for trouble? I probably won't replace this anytime soon (adopting a child) and the system is dated so I will probably just look for components on ebay if I can't find something to fix (wiring?)
In over my head?
First Boat, a well-equipped 1977 Camper Nicholson 31
What is all this stuff and how does it work?