Installing the Fishfinder 340C > Installing the Wiring Harness

Installing the Fishfinder 340C to a Garmin CANet

The Fishfinder 340C is a CANet compatible sonar device. Using the CANet - if applicable - optimizes the performance of CANet- compatible units, allowing sonar information from the Fishfinder 340C to be shared with up to two CANet compatible Garmin GPS units. A standard NMEA connection only allows depth, temperature, and speed information to be sent to a single GPS device, where a CANet connection provides full sonar readings, including Ultrascroll, so you can view and control the same information on your compatible GPS unit(s) as you can on your Fishfinder 340C.

Note: To use the Garmin CANet with your Fishfinder 340C, you need to obtain a CANet Kit. Contact your Garmin dealer, or visit www.garmin.com.

Included Equipment in a CANet Kit:

•40 ft (12.19 m) CANet Extension Cable

•2 CANet Terminators

•7 3-Wire Connectors

Note: The CANet Kit contain installation instructions as well. If you need additional help, please contact Garmin Product Support.

To install the 3-Wire Connector:

1.Insert up to wires into the 3-wire connector. Do not strip the wire insulation. See the CANet Terminator Connection diagram on the next page.

2.Use a standard pair of pliers to fully depress the red button into the connector.

3.Wipe the excess water repellent gel from the connection.

CANet Notes:

•Power and ground wires require 18 AWG. You can extend the CANet wiring of the GSD 22 power/data cable up to 80 ft (24.38 m) total length using the CANet Connections Kit.

•The CANet Extension Cable can support a maximum of two display units and one sonar unit.

•The maximum length of cable from the CANet Extension Cable to the sonar or display units is 6 ft.

•Refer to the chartplotter’s installation instructions for wiring the GPS 17 sensor and other devices.

•Ground the drain wire on the first display unit. Do not ground the drain wire on the subsequent display units or the sonar unit.

•The CANet Extension Cable Black wire is reserved for future use. When inserting a CANet unit on the CANet Extension Cable, reconnect all wires according to their color.

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Fishfinder 340C Owner’s Manual