External Power Supply, Jump Lead Starting - Porsche Cayenne Turbo Driver Manual

External power supply,
jump lead starting
If 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 types. The capacity
(Ampere hours, Ah) of the donor battery must not
be substantially less than that of the discharged
battery.
The discharged battery must be correctly
connected to the vehicle's electrical system.
Warning!
Risk of damage and injury due to short
circuit.
f Use only standard jump leads with sufficient
cross section and completely insulated
clamps. Follow the jump lead manufacturer's
instructions.
f Route the jump leads so that they cannot be
caught by moving parts in the engine compart-
ment.
The vehicles must not be in contact, otherwise
current might flow as soon as the positive
terminals are connected.
f Carefully ensure that conductive jewellery
(rings, chains, watch straps) does not come
into contact with live parts of the vehicle.
Risk of caustic burns from escaping acid.
f Do not lean over the battery.
Danger of gas explosion.
f Keep sources of ignition away from the
battery, e.g. naked flame, burning cigarettes
or sparks due to cable contact.
f Before connecting jump leads, it is essential to
thaw out a frozen battery.
Jump lead starting
Always observe the sequence below:
1. Remove cover A.
2. Open the cap of the positive terminal for jump
lead starting (+).
3. Attach the positive lead first to the positive
terminal for jump lead starting (+), then to the
positive terminal of the donor battery.
Minor Repairs
325