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8.1 Electrical system
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
(2) Precautions concerning a 12 V/24 V mixed power supply voltage vehicle
An error in the connected power supply or a wiring error such as a battery connected in the reverse polarity
will have an adverse effect on the vehicle electrical components, and may lead to a vehicle fire. For this
reason, be very careful of the following points.
<Before building the body>
• Turn OFF the starter switch, and pull out the starter key. Also, disconnect all testers and external
communication devices.
• After carrying out the above work, close the doors and wait for at least 30 seconds before carrying out
body-building work.
<When building the body>
• Disconnect the battery cables from the negative terminals of both 12 V and 24 V batteries.
• Even after you have disconnected the cable from the negative terminal of the 12 V battery, be careful not
to accidentally short-circuit the negative terminal of the 24 V battery to the frame or the battery box with
a spanner or other similar tools.
• When taking off power, use the body-building connector (24 V). It is forbidden to directly take off power
from both batteries as a general rule. If this is unavoidable, check É 8.4.1 and É 8.4.2.
• It is forbidden to cut, strip or splice wires or modify connectors or fuses in the existing harness instead
of using the connectors intended for building the body. Refer to É 8.4.1 and É 8.4.2.
1 Battery 24 V
2 Battery 12 V
312 V negative terminal
4Equalizer
5 24 V negative terminal
6Front of vehicle
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