Proper wiring for gps

I think your best bet here would be to post your query on the Raymarine forum.

There are actual technicians over there to look after you.

http://forum.raymarine.com/

Hope this helps you out.

I'm taking this as you want to send the gps information to your C80 not receive from the C80? If this is the case the brown wire on the garmin is the nmea data out +. The Black wire is considered nmea out neg (-) of the garmin. So hook the garmin brown to the white on the raymarine. Hook the black from the garmin to the green on the raymarine. That means you are outputting lat/long info to the raymarine from the garmin.

Check to see if this is a power issue by connecting to shore power and fully charging your batteries overnight with instruments off. While still connected to shore power, with batteries fully charged, turn on C80 navigation system. If the loading screen comes on and does not reset, then try holding down the button immediately to the right of the red power button for at least 3 seconds to see if the system re-boots.

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)

The C Series units have a specific cable that connects directly to the DSM. The GPS antenna has multiple wires that will need to be connected to the "SeaTalk" port on the C80. The SeaTalk cable comes with the display. The GPS connects as indicated in the following link :

http://raymarine.custhelp.com/cgi-bin/raymarine.cfg/php/enduser/std_adp.php?p_faqid=1359&p_created=1222441077&p_sid=aIunftHj&p_accessibility=0&p_redirect=&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MTUsMTUmcF9wcm9kcz03LDczJnBfY2F0cz04NiZwX3B2PTIuNzMmcF9jdj0xLjg2JnBfc2VhcmNoX3R5cGU9YW5zd2Vycy5zZWFyY2hfbmwmcF9wYWdlPTEmcF9zZWFyY2hfdGV4dD13aXJpbmcgdG8gQzgw&p_li=&p_topview=1

If it is an RS 120 or an RS112 antenna you do not need to change it.These are both active antennas in other words they do all the gps computing in the unit itself. You need to look at the wire from the antenna. If it is a coax cable(2 wire) it will not work.If it is 3 or 4 wires it will work. If 3 wire (red ,silver yellow) just hook up color for color.If 4 wire you are going to have to figure out the wiring for it from the units wiring diagram.That could be a big enough pain that you might be inclined to change to the new antenna. If you wire the new RS125 antenna you must wire it to the seatalk buss. The seatalk wires are Red Silver and Yellow.The wire from the RS125 are red yellow silver green and brown.Wire as follow to your sea talk cable.Yellow to Yellow, red to red , silver to silver, green to red, brown to silver.
Hope this helps.

It sounds like you are reporting that the GPS is not getting a fix?

What color light are you seeing on the GPS receiver? We are hoping for a green light indicating it has a fix. Any color at all indicated it has power. If there is no light on the receiver, there is no power being fed to it.

Depending on how this was installed you could get power from the C80 itself, or from the larger SeaTalk network if you have instruments and autopilots. MAke sure all of your breakers and switches onboard are powered on to start. The GPS receiver could have been wired to a different circuit than the display.

You have either the DSM250 or DSM300 digital depth sounder module installed. The C80 is not seeing it.

There is an LED status light on the DSM. For starters, it should be lit either red, yellow or green to confirm it is actually powered on. We are hoping for a green light.

Double-check the cable between DSM and C80 for tightness. Also double-check the DSM's power cable for tightness.

The DSM's are sensitive to voltage level onboard. Make sure the DSM's connections to the circuit breaker panel or battery are tight and clean. Double check with a multimeter the there is 12V DC available to the DSM.

Let me know what you find.