SoundMax SM-CMD2021 - Manual (Page 4)

4
Installation/ Connections
First complete the electrical connections, and then check them for correctness. If you are not
confident working with electrical wiring, removing and reinstalling interior panels, carpeting,
dashboards or other components of your vehicle, please call your dealer in order to have the
unit professionally installed.
Before installing the unit, please remove two screws on the top.
Before the installation
1. Remove the old unit from the dashboard.
Remove the outer trim frame.
Insert the keys supplied with the unit into both sides of the unit as shown in figure below
until they click. Pull to remove the old unit from the dashboard. Do not disconnect wires at
this time!
2. Mark polarity of the speaker wires.
Marking the polarity of the speaker wires will make it easier to connect the existing speakers
to your unit. Consult wiring diagram of existing head unit before disconnecting any wires. If
you are not positive of the polarity of the existing wires from the speakers to the head unit,
install new wires.
While the old unit is playing, disconnect the wires from one speaker.
Take a length of masking tape and fold it around the wire so it forms a flag.
On the masking tape mark the polarity of the speaker wires (+ & -), as well as left or
right, and front or rear.
Repeat this procedure for all of the speakers.
Mark the power, ground, and any other wires also.