My autopilot Raymarine ST6001 gives messages on the display like; seatalk failure, no pilot and drivestop, after have working perfekt for 5-6 years. I have find one problem that some thing got warm on the computer board. Thanks in advance, Roland

I am not familiar with your particular model autopilot, but I do know that Raymarine autopilots can be fussy. All must have a compatible gps feeding it, of course. All must have a rudder angle indicator if your auto pilot connects to the wheel or rudder instead of directly to the tiller.

I’m happy to assist further over the phone at https://www.6ya.com/expert/bill_f6ca18ca1db028ed

You can probably find another control head on eBay... the ST6002 should also work, though it's smaller. The ST8002 is the same size but adds a knob meant for powerboats, but should also work. All three models are SeaTalk, which is what you need. The ST70 is also SeaTalk in addition to N2K, so I'd expect it to work.

You are still OK, if it smoked out of box, call Raymarine and yell and they should send you a replacement course computer. Also, there are two SeaTalk circuits, so maybe one still works? I have a replacement brain in stock if you like. 847-746-0100.

I connected my Garmin gpsmap76 to a Raymarine autopilot using the NEMA output from the GPS. The autopilot was also on the seatalk bus. It work fine. The GPS provided navigational guidance to the autopilot

if the ST 6001 shows "no data" and alarms, the course computer is most likely bad. Control head failure is very uncommon, hower you should look at the brain box (T400) and move the control head to the other seatalk terminal (there are two) you may have just one failed SeaTalk port and can use it as is, otherwise, Raymarine will still fix (this week) 847-746-0100

The rudder sensor works like a light dimmer, so you get 5V and ground on the outside two connections and a varying voltage between about 1 and 4 volts depending on rudder position
847-746-0100 www.technicalmarine.com

Very possible that the Wind instrument has a defective Seatalk interface - it happened to me. You could try your Wind in another boat, just connecting it temporarily to the Seatalk Bus - if it jams those it is the problem

Your autopilot should have a separate Course Computer such as the 100, 400, S1... somewhere. Some models have two SeaTalk busses, and the recommended installation is to use one bus for the 6002 control head alone, and the other bus for instruments etc, so a SeaTalk fail on the instrument bus will not disable he Autopilot. I retired my boat this way (after the dealer took the one-bus shortcut).

The real solution is to have the Wind instrument fixed. The cheapest work-around is to cut the yellow SeaTalk wire between the 6002 and the Wind, so that the Wind instrument gets power but does not affect the data bus. That should let the AP and Wind each work normally and independently (no Wind-angle mode on the AP).

Raymarine have a forum you should join for more info and help.

If you have a Raymarine pilot it makes sence to wire it all up to Seatalk. Wire as follows Red to red , silver to silver, yellow to yellow, brown(on rs125) to silver on seatalk buss Green (on rs125) to red on seatalk buss.The above is for the conection between RS125 and C80.
To hook the pilot to system you just need to hook the seatalk lines (red, yellow,silver) from the pilot to the conection with the RS125 and the seatalk cable to the C80.(Color for color).The sea talk connection for your pilot can be picked up from you course computer they are labeld and colored on the unit.
If you are not running a course computer as in the case with the older wheel and tiller pilots you will need to take a sea talk cable and cut it. Once it is cut you will see the red yellow and silver wires and you can tap into there . Remember to connect the cable back together were you cut it. Hope this helps

OK, you are confused. Seatalk is a bus system, using 3 wires , (power +, power-, and Data.) red, bare and yellow repectively. So Red and Bare are 12V and ground. Since the 125 shows a green light, it is getting power and outputting data. but is it seatalk?? to make a 125 Seatalk, you must hook red and green together to 12 V, so check that first. if green is grounded or not connected, that is the problem (or one of them)
Next divide system to its' simplest terms, so hook the GPS straight to the display ST60, and see if it works red to rd, yell to yell and bare to bare (sometimes black) One by one hook the others into the chain until they all work or failed device takes down Seatalk network. If you are missing 12V on a seatalk leg, check 5A fuse in course computer. If you have a pilot, you have a course computer, unless it is ST4000 wheel pilot, and then the brain is the display (course computer is built in to ST4000 display)

Remove all wiring from 4000 head, hook up only 12V, if seatalk fail continues, it is the head. if seatalk fail goes away, hook in instruments one by one until the bad head is found. Seatalk is 12V red, Ground Screen(bare wire) and Data yellow (pulsing voltage). good luck 847-746-0100 John Barry