Michael - As Wheels pointed out, you have the ANCIENT version!
I had that also. The newer control heads show your selected heading. And, the older ones do NOT have a rudder
position indicator. The DIAL adjustment - I'm presuming that is a separate small box with a switch in the middle ... if so, that is the "sea state" adjustment.
Wheels is also correct in that RayMarine
(use to be Raytheon) does NOT support those older models. In fact, if you call them and manage to actually speak to one of their reps, they will tell you that you can send in the whole system, they will look at it, and let you know if it is possible to fix it. If they cannot fix it (most likely) they will send it all back (you are out the postage one-way). They do, however, have rebuilt NEW units, that they will sell you at a substantial discount. Unfortunately, you will need MOST new items, not just the one(s) that failed. The exception is the ram - it works with the newer stuff (they won't tell you that or admit it).
I don't recall
the exact symptoms on the autopilot failure - but the results sound similar to what you describe. My problem turned out to be the fluxgate compass
. If you disconnect the compass, and try it and get the same symptoms, tadaaaaa. I've sold the two control heads that I had, but still have the 'computer'. If you find that it is the computer, you can contact me in PM and we'll see what we can work out. But, frankly, I think your best bet is to ship it all off to RayMarine
, let them ID the problem and then make your choices then (and, I would suggest buying
their rebuilt system).