I have a Silva S15 radio and a Garmin 152 GPS. I don't seem to be able to
connect the two. The Silva manual shows that I need to connect Red (GPS+)
and Green (GPS ground) to the Garmin.


The Garmin has the following
Red (10-40vdc)
Black (ground, power and data)
Blue (NMEA out , COM 1 TX)
Brown (NMEA in, COM 1 RX)
White (NMEA in, COM 2 RX)
Green ( no connection) ????? what's does this do then
Yellow (Alarm Low)

I guess I need to connect the green Silva wire to the Black Garmin, but what
about the red Silva wire, should that go to the Garmin red (10-40vdc) or the
blue NMEA out?.
Any tips on physically connecting these tiny little wires ?

Thanks for your help.

Nigel