Refer to the GPSMAP 2006/2006C/2010/2010C Installation Instructions for wiring the GPS 17 sensor and other devices. 3. For runs over 30' (9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire. 4. Use unit #1 to update the GSD 20 software.. 2. Attach the GSD 20 to the mounting location using the appropriate You may extend the wiring of the GSD 20 fasteners. Page 6 4. IN ORDER TO UPDATE THE GSD 20 SOFTWARE, THE GPSMAP UNIT MUST BE CONNECTED TO PORT A OF THE GSD 20. 5. THE ORANGE WIRE MUST BE PULLED LOW (-) IN ORDER FOR THE GSD 20 TO POWER ON.
Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.. Thank you for choosing the Garmin GSD 20. The GSD 20 is an intelligent, remote sounder module designed to include powerful features as found in other Garmin sounders, including Depth Control Gain (DCG chartplotters, it provides full-featured depth sounder functions.. Page 7: Wiring To Single Gpsmap 276C/296/376C/396 NSTALLATION NSTRUCTIONS.