Porsche carrera gt-2004 Manuel D’Utilisation

Practical Tips, Emergency Service

167

Emergency Starting with Jumper 

Cables 

If the battery is discharged, e.g. in winter or after 

the car has been parked for a long time, the bat-

tery of another car can be used for starting with 

the help of jumper cables.

Make sure the voltage of both batteries is the 

same.

The capacity (Ampere hours, Ah) of the booster 

battery must not be substantially less than that of 

the discharged battery.

The discharged battery must be correctly con-

nected to the vehicle’s electrical system. 
f Please observe the chapter “BATTERY” on 

Page 161.

f Please observe the chapter “EMERGENCY UN-

LOCKING OF THE ENGINE COMPARTMENT 

LID” on Page 160.

Note
f Do not try to start the car by pushing or tow-

ing. Damage to the catalytic converters and 

other components of the car may result. 

due to short circuit. 
f Use only jumper cables of adequate diameter 

cross-section and fitted with completely insu-

lated alligator clips. 

f Follow all warnings and instructions of the 

jumper cable manufacturer. 

f When connecting jumper cables, make sure 

that they cannot get caught 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 ter-

minals are connected. 

f The cable clamps must not be allowed to con-

tact each other when one end of the jumper ca-

bles are connected to a battery. 

f 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. Be careful not to accidentally re-

verse positive with negative polarity.

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 

severe personal injuries. 

f Keep sources of ignition away from the bat-

tery, e.g. open flame, burning cigarettes or 

sparking due to cable contact or welding work. 

f A discharged battery can freeze even at 

23°F/–5°C. 

Before connecting jumper cables, a frozen bat-

tery must be thawed out.