Garmin gps/nema
06-05-2009, 08:34 AM
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Garmin gps/nema
I have an older gps garmin 130 map, it only wires I use are the power, sounder and antenna, the harness also has a nema in and out. What would they be for? They are maybe 20-24 gauge wire.
06-05-2009, 08:48 AM
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The blue wire is the TDX+ NMEA out, to go into any NMEA device. The brown wire is the RX NMEA in, from any NMEA device. The black wire would be used as a common ground to and from such devies.
It allows your GPS to send and recive data , to other devices, using the NMEA protocols
