6Fishnder 300C Installation Instructions

Step 4: Install the Wiring Harness

The Fishnder 300C comes with a cable assembly that connects it to power and to the transducer with one connection and provides interface
capabilities for connecting external devices.
The color code in the diagram on page 7 indicates the appropriate harness connections. The replacement fuse is an AGC/3AG 3A fuse. If it is
necessary to extend the power wires, use 22 AWG wire. Do not cut the transducer cable. Cutting the transducer cable voids your warranty. If
your boat has an electrical system, you might be able to wire the Fishnder 300C directly to an unused holder on your current fuse block. If you
are using the fuse block, remove the in-line fuse holder supplied with the Fishnder 300C. You can also wire the Fishnder 300C directly to the
battery.
CAUTION: The Fishnder 300C maximum input voltage is 33 Vdc. Do not exceed this voltage, because this can damage the Fishnder 300C 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
Fishnder 300C. For information on connecting to a NMEA 0183-compatible device, see page 7.
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fuseblockontheboat,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3Afuse(onthefuseblockorinthein-lineholder).
5. AlignthenotchesonthecableplugandonthebackoftheFishnder300C.Insertthecableintotheconnector,andturnthelockingring
counter-clockwiseuntilitstops.
—
+
To 10–38 volt boat supply
3A
+
Boat ground
3A fuse
To Fishnder 300C
Fuse block
Pin 8 - ground (black)
Pin 18 - NMEA out (blue)
Pin 13 - dc positive (red)
Pin 7 - alarm (yellow)
Fishnder 300C Power/Data
Cable Pin Assignment