Question about Raymarine A65 Combo GPS Chartplotter/Fishfinder

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Sea talk failure

I have Raymarine ST4000 Plus autopilot.

Sea talk failure has shown up on my screen. The auto pilot will not work.

Water depth screen works.

Boat speed works.

Wind speed does not work.

Doug

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  • jhighsmith Jul 30, 2008

    ST 6000+ auto pilot displays "sea talk fail".....tri-data shows no display at all and my RL70CRC chart plotter indicates "no fix".....radar works fine.

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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

Posted on Jan 26, 2010

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If it is new installation ,power wires could be undersized,or battery discharged .
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I bought a C80 Raymarine Plotter this has a NMEA pigtail with Brown, Screen, Yellow, Green And White wires I haave also bought a RS 125 Receiver this has a pigtail lead with Red , Green, Yellow, Brown and...


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

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1 Answer

Wiring of seatalk instruments


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)

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This is a common problem if the GPS is hooked up to an electronic heading sensor such as an autopilot. If the heading sensor is not calibrated properly, the boat will appear to be facing the wrong direction.

If you have an autopilot, consult the installation guide and perform the sea trial procedures. That should get your boat lined up properly.

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