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4 pin Garmin proprietary connector layout
4 pin Garmin proprietary connector
4 pin connector, found on the back cover.
Pin Name cable color
1V+ (power in)maximum of 3.15V, recommended 3V
2data in (RS232 Rx)green
3data out (RS232 Tx)white
According to 10 reports in our database (9 positive and 1 negative) the Garmin GPS eTrex, eMap, Geko connector pinout should be correct.

Is this pinout
Garmin GPS eTrex, eMap, Geko connector visual pinout:click to enlarge
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