306
Minor Repairs
External Power Supply,
Jump-Lead StartingIf the battery is flat, the battery of another vehicle
can be used for starting or as an external power
supply with the help of jump leads.
Both batteries must be 12 V batteries.
The capacity (Ah) of the do nor battery must not be
substantially less than that of the flat battery.
The flat battery must be connected correctly to
the vehicle’s electrical system.
Warning!
Risk of short circuit, damage and explosion,
resulting in serious personal injury or death.
f Use only jumper cables of adequate diameter
cross-section and fitted with completely
insulated alligator clips.
f Follow all warnings and instructions of the
jumper cable manufacturer.
f When connecting jumper cables, make sure
that they cannot get ca ught in any moving
parts in the engine compartment.
The jumper cables must be long enough so
that neither vehicles nor cables touch another.
f The vehicles must not be in contact, otherwise
current might flow as soon as the positive
terminals are connected.
f The cable clamps must not be allowed to
contact each other when one end of the
jumper cables are connected to a battery. f
Carefully ensure that tools or conductive
jewelery (rings, chains, watch straps) do not
come into contact with the positive jumper
cable or the positive battery post.
f Improper hook-up of jumper cables can ruin
the alternator.
Danger of caustic burns.
f Do not lean over the battery.
Danger of gas explosion.
f Improper use of booster battery to start a
vehicle may cause an explosion, resulting in
serious personal injury or death.
f Keep sources of ignition away from the
battery, e.g. open flame, burning cigarettes or
sparking due to cable contact or welding work.
f A discharged battery can freeze even at
14 °F ( −10 °C). Before connecting jumper
cables, a frozen battery must be thawed out.
+ = Positive terminal for jump-lead starting
– = Ground point for jump-lead startingExternal power supply/jump-lead startingAlways observe the sequence below:
1. Open the cap on the positive terminal for
jump-lead starting ( +).
2. Attach the positive lead first to the positive terminal for jump-lead starting ( +), then to the
positive terminal of the donor battery.
3. Connect the negative lead first to the negative
terminal of the donor battery, then to the
ground point for jump-lead starting ( –).
