Can a 1999 Sitex GPS receiver antenna be connected to a Raymarine C80 chartplotter? If so, which color wires get hooked up?

The issue is related to the antenna, either bad connection, low voltage or faulty gps. Start by checking the voltage supplied to the antenna (most probably through SeaTalk from the plotter), if you find this to be 11V or bellow - beef it up by adding external 12V. You can also check the wiring, if all looks ok - it is time to get a new gps antenna. Raymarine has a retrofit pack for the new RS130 which also includes SeaTalk ng converter. With some luck it's only the power...

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.

I'm not sure where you would locate "reset to factory specifications". Look for it in the GPS menus (may be in the System) and reset, it is no big deal to reset a GPS, it will not hurt anything. I the GPS is set to back Track. To check this turn your boat around and follow the track on the lake chart. If you and your boat are now going in the same direction the GPS was set on Back Track.

The two devices can share Nav data only. No radar, Sonar or Chart will be shared.
Hook the RL70 and the E80 together on SeaTalk and all data will be shared both ways. Alternatively, it could be done with NMEA 0183, which is directional, or you could also translate the RL70 data to NMEA 2000 and share it that way. As long as you have all Raymarine equipment, you are home free using a three wire Seatalk connection, with only two hooked up, Yellow and Bare, color to color.
Remember, this will share Nav Data only.

Hi!

You can free download the manual for Raymarine C80 GPS Receiver from the following link---

Raymarine C80 GPS Receiver Manual

Please do accept this solution and revert for further assistance.

Thanks
Rylee

if your C80 is mounted outside the boat maybe water came inside the C80 .
This typ has a lot of problems with their seal.
Water comes to the keypad and the powerswitch dont work anymore

red and green go to 12v.brown and screen go to earth yellow to yellow.

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

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.