Has anyone connected a Garmin 48 GPS to their ST4000 Plus Autopilot. Is there any secrets. I have tried following the books but no success.
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Jim Russell
Hooked From G48 to ST 4000
I'm not sure if the 4000 plus makes a difference, but I had no problems following the wiring diagram for both units for a successful wiring job. While I rarely use the gps feature, I use the 12 volt feature to save on batteries on the G48. I also have used the bicycle bracket to attach the G48 to the pedistal chrome bar. Contact me directly if you are experiencing any problems or have any questions. Jim
I'm not sure if the 4000 plus makes a difference, but I had no problems following the wiring diagram for both units for a successful wiring job. While I rarely use the gps feature, I use the 12 volt feature to save on batteries on the G48. I also have used the bicycle bracket to attach the G48 to the pedistal chrome bar. Contact me directly if you are experiencing any problems or have any questions. Jim
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Mike DiMario
GPS Connections
Dear GPS, THe GPS has (2) output leads. THey connect to the NMEA on your autopilot. If you need any additoal information, go to joemahaffey.com for color coded diagrams. If you need any other help, please fel free to email me. I am in the owners directory. Mike D.
Dear GPS, THe GPS has (2) output leads. THey connect to the NMEA on your autopilot. If you need any additoal information, go to joemahaffey.com for color coded diagrams. If you need any other help, please fel free to email me. I am in the owners directory. Mike D.
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Paul Bednarzyk
GPS
On my 6000+ and a friend's 4000+, the data cable has two wires for data output. The positive wire goes to the NEMA interface slot on the back of the control head for the autopilot. The other wire connects to a negative lead. I used the ground(negative)bus bar in the helm console. This came from Raytheon after we had trouble getting the two to talk to each other. By the way, both my friend and I use Garmin hand helds for this purpose as well. I hope this helps. Paul Bednarzyk S/V Knot Again
On my 6000+ and a friend's 4000+, the data cable has two wires for data output. The positive wire goes to the NEMA interface slot on the back of the control head for the autopilot. The other wire connects to a negative lead. I used the ground(negative)bus bar in the helm console. This came from Raytheon after we had trouble getting the two to talk to each other. By the way, both my friend and I use Garmin hand helds for this purpose as well. I hope this helps. Paul Bednarzyk S/V Knot Again
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Jim Russell
Ah, You need a cable
Probably needless to say at this point, but but you do need the four wire connecting cable that you purchase from Garmin. That cable will have information that identifies the power wires that can hook to the comparable power lines for the gps, and also to the data wires from the Autopilot. The wiring diagram for the 4000 is in your owners manual. Following that information should make the installation reasonably easy.
Probably needless to say at this point, but but you do need the four wire connecting cable that you purchase from Garmin. That cable will have information that identifies the power wires that can hook to the comparable power lines for the gps, and also to the data wires from the Autopilot. The wiring diagram for the 4000 is in your owners manual. Following that information should make the installation reasonably easy.
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Paul Bednarzyk
Connecting
Uh, Jim, You are absolutely correct in requiring the power/data cable. I made the presumption that it was a given. Again proving what happens when one makes assumptions. Paul Bednarzyk S/V Knot Again
Uh, Jim, You are absolutely correct in requiring the power/data cable. I made the presumption that it was a given. Again proving what happens when one makes assumptions. Paul Bednarzyk S/V Knot Again
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R. Britton
What I found on the Garmin
I was the one who posted the question, here is what needs to be done for those of you in the future.. Thank you for contacting Raytheon Marine Co. We frequently see Garmins mis-wired in NMEA interfaces, as Garmin does a poor job explaining the functions of their wires in their manual. Garmin uses a single wire data output, this is their data out "+", and on handheld GPS' it is typically their brown wire. This is connected to our NMEA input positive. The next part is where everyone messes up. IGNORE the Garmin white wire, it is their NMEA input "+", not their output "-", and is of no interest to us and should be tied off and kept out of the way. Garmin uses a common ground for DC power and data, so a jumper wire has to be run from the Garmin black (probably already tied to the negative side of your boats 12 volt DC system) to our NMEA input negative. All the Garmin needs to be set at is NMEA 0183 either 1.5 or 2.0, and this by defintion should be 4800 baud. If you have any further questions please do not hesitate to contact us. Sincerely Brian K. Gifford Product Support Raytheon Marine Company 22 Cotton Road Suite 280 Nashua, NH 03063 1-800 539 5539
I was the one who posted the question, here is what needs to be done for those of you in the future.. Thank you for contacting Raytheon Marine Co. We frequently see Garmins mis-wired in NMEA interfaces, as Garmin does a poor job explaining the functions of their wires in their manual. Garmin uses a single wire data output, this is their data out "+", and on handheld GPS' it is typically their brown wire. This is connected to our NMEA input positive. The next part is where everyone messes up. IGNORE the Garmin white wire, it is their NMEA input "+", not their output "-", and is of no interest to us and should be tied off and kept out of the way. Garmin uses a common ground for DC power and data, so a jumper wire has to be run from the Garmin black (probably already tied to the negative side of your boats 12 volt DC system) to our NMEA input negative. All the Garmin needs to be set at is NMEA 0183 either 1.5 or 2.0, and this by defintion should be 4800 baud. If you have any further questions please do not hesitate to contact us. Sincerely Brian K. Gifford Product Support Raytheon Marine Company 22 Cotton Road Suite 280 Nashua, NH 03063 1-800 539 5539
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