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8.4 Power supply
8 Electrics/electronics
MITSUBISHI FUSO body/equipment mounting directives for FE Issue date: 20. 10. 2020
! Only print out complete sections from the current version
8.4 Power supply
8.4.1 Taking power from the existing wiring
(a) Source the power for the lamps and devices of
the built body from the specified connector.
If an electrical device related to the built body is
to be added, do not install a part or route a
harness that can give a false signal to the power
line and ground line of the electrical devices on
the vehicle side.
Adding a wire to a midway point of the existing
wire or increasing capacity by changing the fuse
causes an excessive current to flow through the
power supply and fuse box, leading to a fire.
Never change or add electrical wires except for
those contained in this manual.
Increase the number of lamps according to the
table given below (load, power source, etc.).
(b) Typical faulty wiring
8.4.2 Taking power via the onboard battery
terminal
Take power by way of the onboard battery terminal
only when doing that is absolutely necessary to
achieve body building. If it is done unavoidably,
observe the following precautions.
(a) Add a fuse of a correct type to any additional
wire to thereby protect the circuit.
(b) Use a wire of 5.0 mm
2
or more for the
additional wire ("between battery terminal and
fuse" of the next figure (É 8.4.2). Set the wire
as short as possible and make sure that its
jacket is not damaged to result in a short.
(c) For the combination of the capacity of the
additional fuse and the wire size between the
fuse and the additional load, study those
marked with v in "List of recommended
combinations of fuse capacity and wire size"
(É 8.4.2).
(d) Install the additional fuse in a waterproof cover
(e.g. electric cover) or take an equivalent
waterproofing measure for the additional fuse.
Do not add wires or fuses to the existing
high-current fuse box.
(e) Use of a directly connected power supply
causes the onboard battery to tend to run down
quickly. Make sure that the customer
understands and observes the following
handling precautions:
• Do not use the onboard battery as a service
power supply (for the clock, memory, etc.).
1 2 3
4
5 6
7
8
N54.15-2223-00
1Battery
2 High-current fuse
3Switch
4 The amount of current is increased by the additional
lamps, which applies load on the switch, fuse, and
wires, resulting in a fire.
5 Additional lamps
6 Existing lamp
7 Existing wire
8 Additional wires
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