Wiring Connection - NorthStar EXPLORER 443S Installation And Operation Manual

5-4 Wiring Connection

CAUTION
1 Amp fuses must be positioned where
shown in the wiring diagrams.
If possible, route the transducer cables away from
other wiring on the boat. Electrical noise from
engine wiring, bilge pumps and other electrical
equipment can affect the unit.
The shortest and most direct connection to the
boat's battery helps to minimise voltage drop.
Ensure that any cable connections do not lay in
the bilge.
Two wiring options are described in this section:
· Basic Wiring. This does not start the
fishfinder automatically when the boat
ignition is switched on and it disables the
engine hours counter.
· Auto Power Wiring. This must be used for
engine hours and fuel computer options.
CAUTION
The Explorer 443s/443sp must be run off a 12
volt battery and must not be run off a circuit
without a battery.
Basic Wiring
1A Fuse
Main
switch
12 V DC
Black wire: Connect this to the negative battery
terminal.
Red wire: Connect this to the 12 V positive
battery terminal after the main switch. Fit a 1
Amp fuse as shown.
Yellow wire: Connect this to the black wire. This
disables the engine hours counter.
Power on the fishfinder manually whenever the
main switch is on.
Red
Yellow
Black
Northstar Explorer 443s/443sp Installation and Operation Manual
Auto Power Wiring
To ignition
1A fuse
system
Ignition
switch
1A fuse
External
Beeper or
Light
Main
switch
12 V DC
Black wire: Connect this to the negative battery
terminal.
Red wire: Connect this to the 12 V positive
battery terminal after the main switch. Fit a 1
Amp fuse as shown.
Yellow wire: To enable the engine hours counter
and start the fishfinder automatically when the
ignition is turned on, connect the yellow wire to
the ignition system, through a 1 Amp fuse.
Note: That the fishfinder cannot be turned off while
the ignition is on.
Flashing Light and/or External beeper (443sp
ONLY)
Use the green wire, if desired, to connect a
secondary alarm indicator such as a flashing light
or a 12 V external beeper with a built in drive
circuit. Refer to the wiring diagram. If the external
beeper or light requires more than 250 mA DC
total, fit a 12 V relay. Consult your Northstar dealer
for more advice.
NMEA Instruments (443sp ONLY)
Use the white wire, if desired, to connect the
fishfinder to other NMEA instruments such as
Northstar's depth repeater. (See section 5-5 for
more information).
White
(NMEA out)
Yellow
Red
Green
Black
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