Panasonic CQR255SEUC - Manual (Page 24)

Installation Guide
continued
A handy way to identify the speaker leads and the
speaker they connect with is to test the leads using
a 1.5 volt AA battery as follows.
Hold one lead against one pole of the battery and
stroke the other lead across the other pole. You will
hear a scraping sound in a speaker if you are hold­
ing a speaker lead.
If not, keep testing different lead combinations until
you have located all the speaker leads. When y o u
label them, include the speaker location for each.
Antenna Motor
If your vehicle is equipped with an automatic power
antenna, identify the vehicle motor antenna lead by
connecting one bulb tester lead to the vehicle bat­
tery lead and touching the remaining exposed wires
from the cut radio connector plug one at a time. You
will hear the antenna motor activate when you touch
the correct wire.
Antenna
The antenna lead is a thick, black wire with a metal
plug at the end.
Speakers
Connect the speaker wires. See the wiring diagram
below for the proper hookups. Follow the diagram
carefully to avoid damaging the speakers and the
stereo unit.
The speaker used must be able to handle more
than 40 watts of audio power. If using an optional
audio power, the speakers should be able to handle
the maximum amplifier output power. Speakers
with low input ratings can be damaged.
Speaker impedance should measure 4 - 8 ohms,
which is typically marked on most speakers. Lower
or higher impedance speakers will affect output and
can cause both speaker and stereo unit damage.
CAUTION : Never ground the speaker cords. For
example, do not use a chassis ground system or a
three-wire speaker common system. Each speaker
must be connected separately using parallel insulat­
ed wires, if in doubt about how your car's speakers
are wired, please consult with your nearest profes­
sional installer.
□ Connect All Leads
Now that you have identified all the wires in the
vehicle, you're ready to begin connecting them to
the stereo unit wires. The connection diagram on
Page 29 show the proper connections and color
coding of the leads.
We strongly recommend that you test the unit
before making a final installation.
You can set the unit on the floor and make tempo­
rary connections to test the unit. Use electrical tape
to cover all exposed wires.
IMPORTANT : Connect the red power lead last,
after you have made and insulated all other connec­
tions.
Ground
Connect the black ground lead of. the power con­
nector to the metal vehicle chassis.
CORRECT
No Cortimon Ground
L *
rr^
rr^
n *
, ^
INCORRECT
Common Chassis Ground
L *
T),
r I
INCORRECT
Speaker Common
(common earth lead)
24
CO-R255SEUC