wiring Alfa Romeo 147 2008 Owner handbook (in English)

GETTING TO KNOW YOUR CAR
140
RADIO PRESETTING
SYSTEM
(for versions/markets where
applicable)
The car, if not delivered with sound sys-
tem, is fitted with a glove compartment on
the instrument panel (fig. 136a).
Sound system presetting system includes
the following:
– sound system power cables;
– front and rear speaker power cables;
– aerial power cable;
– sound system housing;
– aerial on car roof.The sound system shall be installed in the
proper housing occupied by the glove com-
partment that can be removed by pressing
the two retaining tabs fitted in the glove
compartment: here are the power cables.
If after buying the car you
want to install the sound
system, contact first Alfa
Romeo Authorised Services whose
qualified personnel, in addition to
suggesting the most suitable de-
vices, will evaluate the overall
electric absorption to safeguard the
battery. Excessive loadless ab-
sorption could damage the battery
and lose warranty.
The wiring diagram is the following (fig.
136b):Connector A
A1 N.C.
A2 N.C.
A3 N.C.
A4 + 30 (battery-powered)
A5 Aerial power supply
A6 Light
A7 + 15 (key-powered)
A8 Ground
Connector B
B1 RH rear speaker
B2 RH rear speaker
B3 RH front speaker
B4 RH front speaker
B5 LH front speaker
B6 LH front speaker
B7 LH rear speaker
B8 LH rear speaker
fig. 136a
A0A0715m
fig. 136b
A0A0709m

VEHICLE MAINTENANCE
235
You are also reminded that services with
high current absorption switched on by the
user, such as for example: baby bottle warm-
ers, vacuum cleaner, mobile phone, mini
fridge, etc., quicken the battery draining
processif they are turned on with
the engine offor running at idle speed.
IMPORTANT When installing addition-
al systems on the vehicle, bear in mind that
improper branches on connections of the ve-
hicle wiring are dangerous, particularly if
safety devices are involved.
Battery
60 Ah
70 AhMaximum permissible
loadless absorption
36 mA
42 mA
The maximum absorption of all the ac-
cessories (standard and fitted afterwards)
should be 0.6 mA x Ah (of the battery), as
shown in the following table:CHANGING THE BATTERY
When changing the battery it should be re-
placed with another original one with the
same characteristics. If it is replaced by a
battery with different characteristics, the
maintenance intervals given in the Sched-
uled Maintenance Programme in this chap-
ter are no longer valid and for maintenance
it will be necessary to follow the battery
Manufacturer’s instructions.
USEFUL HINTS TO EXTEND
THE LIFE OF YOUR BATTERY
To avoid rapidly draining the battery and
ensure that it continues to work correctly,
the following should be noted:
– The terminals must always be firmly
tightened.
– Within reason, avoid using electrical de-
vices for a long time when the engine is
switched off (radio, hazard warning lights,
parking lights, etc.).– When the vehicle is parked in a garage,
ensure that the doors, bonnet, boot and in-
ner lids are closed properly so that the lights
do not stay on permanently.
– Before carrying out any work on the
electric system, disconnect the negative ca-
ble from the battery.
– If after buying the car, you wish to in-
stall electric accessories which require a per-
manent electric supply (alarm, voice feature,
radionavigator with satellite antitheft func-
tion etc.) or accessories that burden the elec-
tric system, contact Alfa Romeo Authorised
services whose qualified personnel, in ad-
dition to suggesting the most suitable de-
vices belonging to Lineaccessori Alfa Romeo,
will evaluate the overall electric absorption,
checking whether the vehicle’s electric sys-
tem is capable of withstanding the load re-
quired, or whether it should be integrated
with a more powerful battery. In fact, as
some of these devices continue absorbing
energy even when the ignition key is off (car
stationary, engine off), they gradually drain
the battery.