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Connecting the units
WARNING
• Use speakers over 50 W (output value) and between
4 Ω to 8 Ω (impedance value). Do not use 1 Ω to 3 Ω
speakers for this unit.
• The black cable is ground. When installing this unit
or power amp (sold separately), make sure to connect
the ground wire first. Ensure that the ground wire is
properly connected to metal parts of the car's body.
The ground wire of the power amp and the one of this
unit or any other device must be connected to the car
separately with different screws. If the screw for the
ground wire loosens or falls out, it could result in fire,
generation of smoke or malfunction.
Ground wire
Other devices
Metal parts of car's body
(Another electronic
device in the car)
Note
• When this unit is installed in a vehicle without ACC
(accessory) position on the ignition switch, red cable
must be wired to the terminal that can detect the
operation of the ignition key. Otherwise, battery drain
may result.
ACC position
• Use this unit with a 12-volt battery and negative
grounding only. Failure to do so may result in a fire or
malfunction.
• To prevent short-circuit, overheating or malfunction,
be sure to follow the directions below.
— Disconnect the negative terminal of the battery
before installation.
— Secure the wiring with cable clamps or adhesive
tape. To protect the wiring, wrap adhesive tape
around them where they lie against metal parts.
— Place all cables away from moving parts, such as
gear shift and seat rails.
POWER AMP
No ACC position
— Place all cables away from hot places, such as
near the heater outlet.
— Do not pass the yellow cable through a hole into
the engine compartment to connect to a battery.
— Cover any disconnected cable connectors with
insulating tape.
— Do not shorten any cables.
— Never cut the insulation of the power cable of
this unit in order to share the power to other
equipment. Current capacity of the cable is
limited.
— Use a fuse of the rating prescribed.
— Never wire the speaker negative cable directly to
ground.
— Never band together multiple speaker's negative
cables.
• Control signal is output through blue/white cable
when this unit is powered on. Connect it to an
external power amp's system remote control or the
vehicle's auto-antenna relay control terminal (max.
300 mA, 12 V DC). If the vehicle is equipped with a
glass antenna, connect it to the antenna booster
power supply terminal.
• Never connect blue/white cable to external power
amp's power terminal. Also, never connect it to the
power terminal of the auto antenna. Otherwise,
battery drain or malfunction may result.
<CRD4475-A> <21>
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