[db27513]

Im trying to connect my 545s to my ST4000. Has anyone done this? The Garmin says to use two wires to connect to a NMEA device: a Blue NMEA out wire (positive), and a ground. The ST4000 labels its NMEA inputs as Data in +ve (a red wire) & Data in -ve (a blue wire).

The problem? Garmin calls its blue wire as positive (RXD+) while Autohelm says the blue wire should be negative. Autohelm also doesnt mention anything about grounding the other lead..

Any clues?

Thanks
Dave in NC