I'm trying to wire my Garmin street pilot 3 to my livorsi GPS speedo. The Garmin has a DB9 monitor type plug as the output cable so I bought a plug to connect to that but need to know which wires to connect to it. Which position on the DB9 plug is the NMEA+? After that which wire do I connect to the livorsi gauge? I figured I would just cut the plug off the livorsi gps puck.

http://www.offshoreonly.com/forums/g...ps-output.html

I don't have one single wire to hook up. I have a 9 pin connection that I need to determine which pin is the NMEA+.

I have the diagram and other than TX+ and RX+ the power does not go through the DB-9 serial PC Connector. This is for the 4000/5000 GPSMAP series if that is what you have.

Yea the power goes through a separate cable. I'm just looking for the nmea output to wire to the speedo.


I think this might be it as long as its an industry standard

contact direction (GPS) signal level description
1 output CD RS232 wire selectable 1PPS
2 output TXD RS232 NMEA data port output
3 input RXD RS232 NMEA data port input
4 not connected
5 both ground 0 V ground
6 output DSR RS232 wire selectable 1PPS
7 not connected
8 output CTS RS232 wire selectable 1PPS
9 not connected

Yes that sounds right. Looks like pin 2,3, and 5 http://www8.garmin.com/specs/pcwiring.pdf

So just hook pin 2 to the blue wire on the livorsi GPS puck wiring?

Actually it looks like its the white wire if I cut the wires off the GPS puck from livorsi. That sound correct?

Oops, sorry.

That I don't know. I would call garmin tech before hooking up if you are unsure. I thought you just needed help with what wire went to the pins on the nmea.