Fiat 500X Owner's Handbook Manual page 118

Any electric brake must be powered
directly by the battery through a cable
with a cross-section of no less than 2.5
2
mm . In addition to the electrical
branches, the vehicle electrical system
can only be connected to the supply
cable for an electric brake and to the
cable for an internal light for the trailer,
not exceeding 15 W. For connections,
use the preset control unit with a
battery cable with section not less than
2
2.5 mm . The use of auxiliary loads
other than external lights (e.g. electric
brake) must take place with engine
running.
116
INSTALLING A TOW
HOOK
The towing device should be fastened
to the body by specialised personnel
according to any additional and/or
integrative information supplied by the
Manufacturer of the device. It must also
meet current regulations with reference
to Directive 94/20/EC and subsequent
amendments.
For any version the towing device used
must be right for the towable weight
of the vehicle on which it is to be
installed.
For the electrical connection a standard
connector should be used which is
generally placed on a special bracket
normally fastened to the towing device,
and a special ECU for external trailer
light control must be installed on the
vehicle. 7 or 13-pin 12 V DC
connections should be used (CUNA/
UNI and ISO/DIN Standards). Follow
any instructions provided by the vehicle
manufacturer and/or the towing device
manufacturer.