Has anyone here done this? From what I can gather, all I should have to do is connect the brown wire from the GPS to the NMEA IN on the ST4000. The ST4000 says to connect the NMEA out to ground. Can I jump the NMEA OUT (ST4000) to the ground on the ST4000 or just leave it off? Also if you have done this already with this equipment, how well does it track?
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Memory Serves Me!
If memory serves me, I believe that all I did was connect the brown to the NMEA in. I also hooked the +/- up to power up the GPS. I got this information from somewhere, I can't remember if it was from the Map 76 manual or the 4000, one of the two. You will also have to the Set Up menu to the interface section and set the GPS to NMEA. Mine works and tracks well. You can identify any waypoint and hit track and you'll steer right for it. If you want to back track a track, you will have to save the track and give it a name. Identify the track by name, hit go to reverse and it will take you back to where you came from. Luck
If memory serves me, I believe that all I did was connect the brown to the NMEA in. I also hooked the +/- up to power up the GPS. I got this information from somewhere, I can't remember if it was from the Map 76 manual or the 4000, one of the two. You will also have to the Set Up menu to the interface section and set the GPS to NMEA. Mine works and tracks well. You can identify any waypoint and hit track and you'll steer right for it. If you want to back track a track, you will have to save the track and give it a name. Identify the track by name, hit go to reverse and it will take you back to where you came from. Luck
Are you saying....
Are you saying you jumped the power +/- from your ST4000 to power your GPS? I have my GPS powered seperatly from the ST4000. I'll try to just connect the brown wire and go thru the config and see what happens. Thanks!
Are you saying you jumped the power +/- from your ST4000 to power your GPS? I have my GPS powered seperatly from the ST4000. I'll try to just connect the brown wire and go thru the config and see what happens. Thanks!
Check
I made a permanent installation on my console for the GPS. I ran the "brown" to the NMEA in, and then ran the positive and negative 12 volt from the GPS to the approriate connections on the ST4000 to power up the GPS. When I have the GPS attached to the console and plugged in, with the ST4000 turned on, the GPS and 4000 act as one unit with no drain on the GPS's batteries. Do you have the Garmin Map 76 power data cord?
I made a permanent installation on my console for the GPS. I ran the "brown" to the NMEA in, and then ran the positive and negative 12 volt from the GPS to the approriate connections on the ST4000 to power up the GPS. When I have the GPS attached to the console and plugged in, with the ST4000 turned on, the GPS and 4000 act as one unit with no drain on the GPS's batteries. Do you have the Garmin Map 76 power data cord?
PWR DATA CORD
Yes I do have to GPS power data cord. This is a new GPS I bought to replace my old Garmin 75. I have it hardwired (via the pwr/data cord) to the boats battery and mounted on the pedestal. I have run the brown & white wires from the GPS to the ST4000 (but haven't connected anything yet). It looks like I will not need the white wire from the GPS which is NMEA out. My old GPS was not NMEA so I'm looking forward this season to using this new feature. Its clear that the brown wire from the GPS goes to the NMEA in on the ST4000. I'm just a little worried about whether I need to connect the NMEA out to a ground. It seems to me that the ST4000 and GPS are both already grounded since they are both hardwired to boat battery (just separately). I guess the worse that will happen is that I'll blow a fuse.
Yes I do have to GPS power data cord. This is a new GPS I bought to replace my old Garmin 75. I have it hardwired (via the pwr/data cord) to the boats battery and mounted on the pedestal. I have run the brown & white wires from the GPS to the ST4000 (but haven't connected anything yet). It looks like I will not need the white wire from the GPS which is NMEA out. My old GPS was not NMEA so I'm looking forward this season to using this new feature. Its clear that the brown wire from the GPS goes to the NMEA in on the ST4000. I'm just a little worried about whether I need to connect the NMEA out to a ground. It seems to me that the ST4000 and GPS are both already grounded since they are both hardwired to boat battery (just separately). I guess the worse that will happen is that I'll blow a fuse.
Same Thing
we're talking about the same thing here, just a different way to get there. I'm 90 percent positive that that is all I did. I'll be going to the boat this weekend and I'll check to see if I can fine the schematic that I used when I hooked mine up. Let me know how it works out. Later!
we're talking about the same thing here, just a different way to get there. I'm 90 percent positive that that is all I did. I'll be going to the boat this weekend and I'll check to see if I can fine the schematic that I used when I hooked mine up. Let me know how it works out. Later!
We have an Autohelm 7000 on our boat,...
but the same hookup should apply in your case. In order to get our handheld Garmin 38 and the Garmin 178C to work with the 7000 was to connect the GPS data out to the NMEA data in port on the ST6000 head. The Garmin data in and ST6000 data out must be run to ground. As mentioned in a previous post you need to make sure that your Garmin is setup for NMEA. It took a lot of help desk time with both Raymarine and Garmin to determine the importance of the ground connection. Terry
but the same hookup should apply in your case. In order to get our handheld Garmin 38 and the Garmin 178C to work with the 7000 was to connect the GPS data out to the NMEA data in port on the ST6000 head. The Garmin data in and ST6000 data out must be run to ground. As mentioned in a previous post you need to make sure that your Garmin is setup for NMEA. It took a lot of help desk time with both Raymarine and Garmin to determine the importance of the ground connection. Terry
Thanks Terry
Terry, I have an e-mail into Raymarine about this. If it is so important to connect the NMEA out to ground, why can't I just use a jumper wire and connect from the ST4000(-) over to the (-) NMEA? The GPS is already grounded. I suppose I could run the ground (-) from the GPS to the ST4000 (-) but it seems like a lot unnecessary work.
Terry, I have an e-mail into Raymarine about this. If it is so important to connect the NMEA out to ground, why can't I just use a jumper wire and connect from the ST4000(-) over to the (-) NMEA? The GPS is already grounded. I suppose I could run the ground (-) from the GPS to the ST4000 (-) but it seems like a lot unnecessary work.
Just got off the phone with Raymarine
I just got off the phone with Raymarine. They told me the Black (or ground) wire from the GPS needs to be connected to the ST4000 NMEA (-). He said I could leave my seperate power connections as they are but run a jumper from the GPS Black (or ground) to the ST4000 NMEA (-).
I just got off the phone with Raymarine. They told me the Black (or ground) wire from the GPS needs to be connected to the ST4000 NMEA (-). He said I could leave my seperate power connections as they are but run a jumper from the GPS Black (or ground) to the ST4000 NMEA (-).
You're welcome Axel. I'm a little puzzled...
by the reply you received. In my case (as I recall) the two leads in question (NMEA data in and data out) were brown and blue. I do not remember which was which. In our case the red (positive or hot) and black (common or ground) supplied power, separate from the NMEA interface wires. Maybe what Raymarine is suggesting is the same thing that solved my problem, except just in a different way. All I know is that for ours to work the Garmin data in lead and AP data out lead were connected to ground. Hope it works for you. Please let us know the outcome. Terry
by the reply you received. In my case (as I recall) the two leads in question (NMEA data in and data out) were brown and blue. I do not remember which was which. In our case the red (positive or hot) and black (common or ground) supplied power, separate from the NMEA interface wires. Maybe what Raymarine is suggesting is the same thing that solved my problem, except just in a different way. All I know is that for ours to work the Garmin data in lead and AP data out lead were connected to ground. Hope it works for you. Please let us know the outcome. Terry
this is the greatest gotcha in boat electronics
Some installations will work by connecting the NMEA - of the autopilot to ground at the pilot but others will not and require as instructed, a wire from the NMEA - of the autopilot to the DC ground wire at the GPS. Who knows why the ground can't be the DC bus... but for many installations it just wont work. Mine and several others I know about would not work or worked sporatically until wired with a NMEA ground to the gps ground.
Some installations will work by connecting the NMEA - of the autopilot to ground at the pilot but others will not and require as instructed, a wire from the NMEA - of the autopilot to the DC ground wire at the GPS. Who knows why the ground can't be the DC bus... but for many installations it just wont work. Mine and several others I know about would not work or worked sporatically until wired with a NMEA ground to the gps ground.
Revelation
Morning Axel: Upon reading the other's input on this, I had a burst of recollection on this. It's been a while since I hooked mine up but I was sure that I had a three wire installation and I did. I went to the NMEA (in) on the A/P from the (out) of the GPS. I then hooked up the DC +/- from the GPS to the approriate connections on the A/P. I then used the same (DC-) to hook up the NMEA ground. I therefore had a three wire hook up from the GPS to the A/P. If I'm not mistaken, there is information on this subject in the archives. Don't forget to switch to NMEA on the GPS! It just won't show any signs of working if you don't. Again, Luck!!
Morning Axel: Upon reading the other's input on this, I had a burst of recollection on this. It's been a while since I hooked mine up but I was sure that I had a three wire installation and I did. I went to the NMEA (in) on the A/P from the (out) of the GPS. I then hooked up the DC +/- from the GPS to the approriate connections on the A/P. I then used the same (DC-) to hook up the NMEA ground. I therefore had a three wire hook up from the GPS to the A/P. If I'm not mistaken, there is information on this subject in the archives. Don't forget to switch to NMEA on the GPS! It just won't show any signs of working if you don't. Again, Luck!!
Thanks again
I think it's pretty clear that I have to use the ground from the GPS to the Auto Pilot NMEA out. Apparently any ground just won't do. The guy at Raymarine told me he gets about 10 calls a day asking the same question and wished that Garmin would specify in their manual that the GPS ground is the NMEA out in this application (they do call out anouther wire for NMEA out but thats for cross talk to devices that need feedback). Thanks again to all that have responded, I'll wire it up over the weekend and post back the results!
I think it's pretty clear that I have to use the ground from the GPS to the Auto Pilot NMEA out. Apparently any ground just won't do. The guy at Raymarine told me he gets about 10 calls a day asking the same question and wished that Garmin would specify in their manual that the GPS ground is the NMEA out in this application (they do call out anouther wire for NMEA out but thats for cross talk to devices that need feedback). Thanks again to all that have responded, I'll wire it up over the weekend and post back the results!
FYI
I wired it up over the weekend. I connected the brown (NMEA +) from the GPS to the NMEA in on the ST4000 and I ran a jumper from the GPS Black (ground) to the ST4000 ground. It works great!
I wired it up over the weekend. I connected the brown (NMEA +) from the GPS to the NMEA in on the ST4000 and I ran a jumper from the GPS Black (ground) to the ST4000 ground. It works great!
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