Connections
The stereo must be connected to power, to speakers, and to
media input sources to function correctly. You should carefully
plan the layout of the stereo, speakers, and your input sources
before making any connections.
Wiring Harness Wire and Connector Identification
Wire Function
Wire Color/
Number
Notes
Antenna
À
Connects the stereo to a typical
AM/FM antenna using an RF
coaxial connector.
If you are installing the stereo on a
boat with a metal hull, you must use
a ground-dependent antenna, and if
you are installing the stereo on a
boat with a non-metal hull, you must
use a ground-independent antenna.
See the installation instructions
provided with your antenna for more
information.
Auxiliary in left
Auxiliary in right
Á
Provides a red and white RCA
stereo line input for audio sources,
such as a CD or MP3 player.
Zone 1 line out
(left)
Zone 1 line out
(right)
Â
Provides a full-range output to an
external amplifier, and is associated
with the volume and tone for zone 1.
Power (+)
Red (yellow on
some wire
harnesses)
Connects to the positive terminal of
a 12 Vdc power source capable of
supplying 15 A.
Ground (-)
Black
Connects to the negative terminal of
a 12 Vdc power source. This wire
should be connected before
connecting the yellow wire. All
accessories connected to the stereo
must share a common ground
location.
Amplifier on
Blue
Connects to an optional external
amplifier to turn it on when the
stereo turns on.
Dim
Orange
Connects to the boat's illumination
wire to dim the stereo screen when
the lights are on.
The gauge of the illumination wire
must be suitable for the fuse
supplying the circuit it is connected
to.
Speaker zone 1
left (+)
White
Speaker zone 1
left (-)
White/black
Speaker zone 1
right (+)
Gray
Speaker zone 1
right (-)
Gray/black
Wire Function
Wire Color/
Number
Notes
Speaker zone 2
left (+)
Green
Speaker zone 2
left (-)
Green/black
Speaker zone 2
right (+)
Purple
Speaker zone 2
right (-)
Purple/black
Fuse
Ã
Contains the 15 A fuse.
Connecting to Power
When connecting the stereo to power, you should connect it
through the ignition or another manual switch.
If it is necessary to extend the power and ground wires, use
14 AWG (2.08 mm
2
) wire. For extensions longer than 1 m (3 ft.),
use 12 AWG (3.31 mm
2
) wire.
1
Route the power wire
À
to the ignition or another manual
switch
Á
, and route the black ground wire
Â
to the battery.
2
If necessary, route a wire
Ã
between the switch and the
battery .
3
Route the wiring-harness plug to the stereo.
Do not connect the wiring harness to the stereo until after all
of the bare wire connections have been made.
4
Connect the black wire to the negative (-) battery terminal.
5
Connect the power wire to the ignition or another manual
switch, and connect the switch to the positive (+) battery
terminal if necessary.
6
Connect the wiring harness plug to the stereo.
Single-Zone System Wiring Diagram
À
Speakers
Á
Water-tight connection
2
FUSION
®
MS-RA55 Installation Instructions
