Installing the Wiring Harness

The Fishfinder comes with a wiring harness that connects the Fishfinder to power and the transducer with one easy-to-remove connection and provides interface capabilities for connecting external devices. The color code in the diagram (see page 17) indicates the appropriate harness connections. The replacement fuse is a AGC/3AG - 3 Amp fuse. If it is necessary to extend the power wires, use 22 AWG wire. DO NOT cut the transducer cable, because this voids your warranty. If your boat has an electrical system, you might be able to wire the Fishfinder directly to an unused holder on your current fuse block. If you are using the boat’s fuse block, remove the in-line fuse holder supplied with the Fishfinder. You can also wire the Fishfinder directly to the battery.

Installing the Fishfinder 340C > Installing the Wiring Harness

To install the wiring harness:

1.Use a test light or voltmeter to determine the polarity of the voltage source.

2.Connect the Red (+ or positive) wire to the positive voltage terminal. (If you use the boat’s fuse block, route the positive connection through the fuse, as shown on the diagram.)

3.Connect the Black (- or ground) wire to the negative voltage terminal.

4.Install or check the 3-Amp fuse (on the boat’s fuse block or in the in-line holder).

5.Align the notches on the cable plug and on the back of the Fishfinder. Insert the cable into the connector, and turn the lock ring counter-clockwise until it stops.

Caution: The Fishfinder input voltage is 33 volts DC. Do not exceed this voltage, because this can damage the Fishfinder and void the warranty.

Note: During a typical installation, use only the Red and Black wires. The other wires do not have to be connected for normal operation of the Fishfinder unit. For information on connecting to a NMEA or CANet compatable device, see pages 17-19.

Boat ground

—

+

To Fishfinder 340C

3-Amp

fuse

-

To 10-33 volt boat supply

2A

+

Fishfinder 340C Owner’s Manual