New Transducers 250C ユーザーズマニュアル

G

ETTING

 S

TARTED

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I

NSTALLATION

The power/data cable connects the Fishfinder 250/250C to a 10-35 

Volt DC system and provides interface capabilities for connecting 

external devices. The color code in the diagram (page 9) indicates 

the appropriate harness connections. If it is necessary to extend 

the power/data wires, use a wire of comparable size and keep your 

extension as short as possible.
The unit can be wired directly to your boat’s battery or to an unused 

holder on your boat’s fuse block. When connecting the unit directly 

to the battery, make sure the 2-Amp in-line fuse supplied with the 

unit is installed. If needed, use a 2-Amp ACG/3AG replacement 

fuse. If you decide to route power through the boat’s fuse block, 

remove the in-line fuse holder on the unit’s power/data cable.

1.  Determine the polarity of the voltage source using a test light 

or voltmeter.

2.  Connect the Red (+ or positive) wire to the positive voltage 

terminal. (If using 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 2-Amp fuse (either on the boat’s fuse 

block or in the in-line holder).

To 10-35 Volt boat supply

2A

-

+

Boat ground

2-Amp 

fuse

To Fishfinder 250/250C

Black wire

Red wire