Fiat Kobelco EX355 Tier2, Technical Manual

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EX355 T5-6-1
ELECTRICAL SYSTEM INSPECTION
PRECAUTIONS FOR INSPECTION AND
MAINTENANCE
1. Disconnect the power source.
Be sure to remove the negative terminals from the
batteries first when taking wire harnesses and
connectors off for repair or replacement work.
Failure to do so can result in damage to the wire
harnesses, fuses, and fusible links and, in some
cases, cause fire due to short circuiting.
2. Wire harnesses identification.
The wire harnesses used on electrical system of
the machine are of three colours: red, white and
brown.
– The wire harnesses red coloured are used for
the main power supply distribution and for direct
connection to the positive not controlled by key
switch.
– The wire harnesses white coloured are used
for the all other functions.
– The wire harnesses brown coloured are used
for ground connection.
Each wire is identified by a four digit numerical
coding printed on the whole lenght every 20 to 30
mm (A).
This coding is also shown on the wiring diagrams of
electrical system (B).
On the general electrical system diagram attached,
numbers and letters are shown before the four digit
coding.
Numbers mean the wire section shown in mm
2 .
The following letters indicate the wire colours;
where W stands for white, R for Red and Br for
Brown. See detail (C).
3. Precautions for connecting and disconnecting ter-
minal connectors.
1) When disconnecting harnesses, grasp them
by their connectors. Do not pull on the wire
itself. Be sure to release the lock first before
attempting to separate connectors, if a lock is
provided. (Refer to “Instructions for Discon-
necting Connector” on page T5-6-3.)
2) Water-resistant connectors keep water out so
that if water enters them, water will not easily
drain from them. When checking water-resi-
stant connectors, take extra care not to allow
water to enter the connectors. In case water
should enter the connectors, reconnect only
after the connectors are thoroughly dried.
3) Before connecting terminal connectors, check
that no terminals are bent or coming off. In
addition, as most connectors are made of
brass, check that no terminals are rusting.
4) When connecting terminal connectors pro-
vided with a lock, be sure to insert them to-
gether until the lock “clicks.”
Right Wrong
Right
Rust
Wrong
(deformation)
Wrong
(Separation)
SM0651
SM0652
A
0511 0511 0511
20 ÷ 30 mm
B
0511
0511
C
2.5 R 0679