3233702 - E1010 SUPPLY - Description
Description
The entire electrical system has been designed
and constructed in accordance with the most up-to-date guidelines
concerning safety and protection, especially against fire risks.There are two main kinds of protection:
- active protection, aimed at reducing possible causes of
faults "at source";
- passive protection, aimed at minimizing the effects of
a possible fault.
The first category involves careful design
of wiring with thorough positioning and anchorage. Wiring is shielded
and protected and the routes are carefully determined. Modifications have therefore been made to
the alternator and starter motor cables, with the adoption of protective
caps, etc.Passive protection includes all interventions
(normally carried out in any case) to reduce high failure currents
(overload and short-circuit). All fuses included in the system are rated
on the basis of nominal absorption of loads which cannot be served
simultaneously, to ensure cut-in in the case of a definite short
circuit.All the electrical systems are supplied
by the battery at a voltage of 12. V.
The battery is in turn recharged by the
alternator (
See E5010 STARTING AND RECHARING
)
during engine operation.
The main supply lines are protected by maxifuses,
contained in two fuse boxes located near the battery and supplied
directly from the latter.The power supplies for all the services
and systems are protected by specific fuses, contained in the junction
unit, or shunt fuses. The shunt fuses are located under the dashboard
either just above the junction unit, or on the right above the glove
compartment.All the power supplies are thus protected,
except for the starter motor cable (battery-starter motor) and recharging
cable (starter motor-alternator): these are protected by an additional
shielded sheath.Some circuits are supplied continuously,
even if the vehicle is stopped and the ignition is off, as they
are connected directly to the battery.Other circuits are supplied by turning
the ignition key to different positions:
- when the key is inserted and turned to the first click,
the ignition is turned on (ON position) and several circuits are
supplied, which are thus called "ignition-operated" (lines
"INT" and "15/54");
- the second click - start up position - supplies the starter
motor (line "50"), (line "50")., while also
disconnecting certain circuits (i.e. those that take up most power)
to ensure maximum current flow to the motor; (INT/A line)
- by extracting the key and turning it in the opposite direction
(and pressing the special button) the PARK position is engaged which
supplies the side lights even with the key switched off ("STAZ"
and "POS" lines); ( See E2010 SIDE LIGHTS / NO. PLATE
LIGHTS).
| The lines through which the supply
is distributed to the various electrical devices are shown on the
wiring diagrams relating to the various functions and systems. This
general diagram shows all lines leaving the battery and maxifuses.
See specific wiring diagrams for greater detail. |