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connection should therefore be made to a point well away
from the battery, and from any fuel vapour area or moving
parts. An engine hanger bracket is often ideal.
iv) Start the subject vehicle in the usual way, and run at a fast
idle.
v) A spark will occur at the first disconnection of a jumper cable,
so it is essential that the first disconnection is made from the
slave car earth. Both batteries (especially the discharged one)
will be 'gassing' heavily at this time, and if the first disconnec-
tion is made at a battery terminal, there is a danger that the
hydrogen gas may be ignited by the spark with a resultant
explosion.
vi) Have the cause of the flat battery investigated and rectified,
and trickle charge the battery as detailed above.
WARNING
• Both the final connection and the first disconnection should
be made away from the battery to reduce the risk of explo-
sion.
• Causing an electrical short circuit could result in serious
personal injury and/or vehicle damage.
• Use only jumper cables of adequate cross-section, fitted with
completely insulated alligator clamps. The cables must be
long enough to allow that neither cars nor cables touch each
other.
• Follow all warnings and instructions of the jumper cable
manufacturer.
• When connecting the jumper cables, keep them away from
engine moving parts.
• The two cars must not contact each other, or current could
flow as soon as the positive terminals are connected.
• When the first clamp on each cable is connected, the other
clamp on that cable must be held carefully to make sure it
does not come into contact with either another cable clamp
or either car.
• Ensure that tools or metal watches or jewellery do not con
tact the battery terminals or electrically live components.
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