Garmin GPS connections to Standard Horizon VHF

[spoff4]

I have read as many posts as I could find, but am still having no success getting my Garmin 126 GPS to communicate with my VHF (Standard Horizon Intrepid LE). From what I have read here and gleaned from the manuals, this should be a simple two wire issue, so how difficult can it be?! Any help would be appreciated.
It appears that the old Garmin GPS communicates via the blue and/or green wire. (Of the remaining GPS wires, red is power; black is ground; and the manual says the yellow, white and brown wires have no connections.) The VHF has a white, a yellow, a brown, a blue, and a green wire. Neither manual designates which wires are (+) or (-), and even if I stumbled into the correct wire connections (which I haven't despite my best efforts), I have no idea which "interface" options would be correct.
The "interface options from the interface screen on the GPS are:
(1)NMEA/NMEA, RTCM/NMEA,RTCM/none, none/none, Garmin/none, none/NMEA;
(2)NMEA 0183 2.0, NMEA 180, NMEA 182, NMEA 183 1.5; and,
(3) 4800 baud, 960 baud, 130 baud, 300, baud, 600 baud, 1200 baud, 2400 baud.
Yikes!
Anyone willing to tackle this? I would love to understand the hows and whys of this, but would be happy for anyone to just tell me which wires and what interface options to use, and I'll continue to be happily ignorant (and appreciative.)

[Thom]

On the Garmin your data output positive wire is the blue one. The Garmin shares dutys for data output negative and power ground in one wire, the black one.

Something is wrong with the Standard Horizon web site so I can't see the manual (what, you thought I kept all these wire colors in my head?) to know what color Standard uses for its data + and - sides. Someone else will have to tell you what they are.

Connect the Garmin Blue wire to whatever someone tells you is the Standard Horizon data output positive wire and then connect the Standard Horizon data output negative wire to the same point where the Garmin is grounded.

In the Garmin's setup put the selections to NMEA/NMEA, NMEA Version 2.0, and set the baud rate to 4800. It should work just fine.

Thom

[HOTSPOT]

BLUE wire from VHF to BLUE wire on GPS.

GREEN wire from VHF to GPS GROUND connection.

Set the GPS interface for NMEA/NMEA and 4800 baud.

Note: if you ever connect the GPS to another device such as a laptop, you must change your interface options accordingly.

Hope this helps.



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[dssmith]

Hello,

Hot Spot and Thom have it exactly correct. I have the Standard horizon intrepid LE and just hooked it to my Garmin 182c.

From the Standard Horizon intrepid there is an accessory plug that has four wires. This is the port you should wire from. If you do not have the accessory plug with pig tail you can get very small wire butt crimp connecters and and attach them to the wires from the gps. You may need to slightly crimp them so as to snugly fit the terminal pins. Plug these on the #3 and #4 terminals of the accessory plug respectively. The pin order of the four pins is

2 3
1 4 when viewed from the rear with the notch in the down or bottom position.

Terminal 3 is the blue NMEA IN terminal Terminal 4 is the NMEA OUT/ground. (black)

If you don't have the accessory plug, order one from Standard Horizon. It has only four wires and is very easy to work with The white wire is + and goes to the positive wire on an accessory speaker for the VHF radio. The yellow wire goes to the - terminal on the accessory speaker. I purchased a small 8watt accessory speaker from west marine. Cost about $22 and greatly enhances the volume of my radio speaker. Mounted it just above my head near the wheel. I can now hear the marine radio above the noise of my 250hp 2 stroke. You will need to mount the speaker somewhere, but it's small and handy.

The remaining two wires are the blue and green/brown wires. (Mine was green)

The blue wire on the back of your Standard Horizon is the NMEA IN wire and receives your gps information from your gps. It hooks up to the NMEA OUT wire from the gps. With my 182C the NMEA out wire was also a blue wire. So blue to blue.

The remaining wire from the Standard Horizon goes to the black ground wire of your gps. If your gps ground wire is not black for some reason, it goes to the ground wire of the gps. Black is traditional ground.

Then, as already pointed out, you have to set the gps communication port to send out the long/lat data. You go the menu of the gps and find the comm port settings. The 182 has comm 1 and comm 2 ports. I set both comm 1 and comm 2 to NMEA in/out and the only choice was 4800 baud.

You will know you are hooked up properly when you power up both radio and gps. After the gps has acquired it's position and is showing long/lat coordinates you can press the POS button on the face of your radio. This is the POSITION button and the longitude and latitude data from the gps will show up on the screen of your marine radio.

So if you are not going to hook up an accessory speaker to your radio, skip the white and yellow wires. Just tape them so as to avoid shorting. Then hook the blue wire on the radio (NMEA IN) to the NMEA out wire from the gps (Likely to be blue or brown) The remaining wire goes to gps ground. (likely black). Power both units up. While the GPS is acquiring the satelites, select the menu on the gps and go to the comm port settings and set them to NMEA In/out and 4800 baud. After the gps finds the satellite and fixes coordinates, don't forget to push the POS (position) button on the radio.

I cannot tell you how confusing and poor the manuals are. I read and reread them about 10 times before I actually figured the scheme out. And that was at the very last minute. My initial plans were way off. The key is to understand that it is only a two wire simple job and that one of the wires (NMEA OUT from the radio) goes to the black ground wire of the GPS. That makes it idiot simple to hook the blue wire of the radio (NMEA IN) to either the blue/brown/NMEA OUT wire of the gps. Configure the comm port and push the pos button on the radio and you are set.

I can fax you the appropriate pages from the manuals if you need.

[spoff4]

Thanks for the responses. I'll give it another try this weekend.

[HydroMan]

Just hooked up this exact combo a week or so ago. Definitely have relay to VHF of Garmin GPS 176c position but have not been able to see if i can get send from VHF on GPS as I don't know anyone in the area with DSC. Can look at the specific colors tomorrow evening and post them but remember used standard garmin out and in... think green and white not sure.... but on standard they had "standard" send and recv and then NMEA send and recv.... used NMEA. Will post colors tomorrow nite.