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Electrical System
Electrical System
General Safety Guidelines
WARNING
Failure to repair a malfunction in the
electrical system can result in serious
damage to vehicle or fire. Always let an
experienced electrical technician perform
repairs.
WARNING
Always wear eye protection when work-
ing around batteries to prevent the risk of
injury due to contact with battery acid.
WARNING
Always replace fuses and circuit break-
ers with the same current/amperage
rating. Never substitute a fuse with foil,
wire or nails. Increasing fuse or circuit
breaker ratings or substituting a fuse
with foil, wire or nails may result in
electrical circuit overheating and possi-
ble fire and injury.
CAUTION
Electronic circuits and components are
designed to sense voltage differences
smaller than 1 volt. While static electric-
ity is not normally dangerous to humans,
it can seriously damage electronic cir-
cuits and components. Circuit boards
mounted in the instrument cluster, for
example, may not fail immediately after
being hit with a static discharge. Rather,
they may work for a while and then fail
for no apparent reason. Therefore, al-
ways work with proper grounding straps
and antistatic mats around electric com-
ponents.
CAUTION
Today’s vehicles contain a high number
of electronic devices. It is very impor-
tant to exercise caution when working
on a modern electrical system, charging
batteries or jump starting the engine. To
minimize the risk of any damage to the
electronic components, follow the proce-
dures below when work is being done to
the electrical system.
NOTE!
Do not work on the electric system
without proper tools and training. Repair
work to the electrical system must be done
by trained professionals. Your Volvo Truck
dealer has the right tools and trained tech-
nicians.
