Island Vehicle Care

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There have been many cases of on-board computers having to be replaced because of incorrect jump start procedures, here is some advice for you in case your vehicle has a discharged battery.

Please note – these are basic instructions for an average vehicle, some vehicles may not have easily accessible batteries, instead they have positive and negative attachments.  Always consult the owner’s manual.

When attaching the clamps to the batteries try not to ‘tap’ them on and off, make a solid connection and leave it there, otherwise you can cause damage to the electrical system and in some extreme cases; battery explosion.

If you are not 100% sure of what you are doing, seek professional help.

1 - Make sure all electrical accessories (A/C, stereo, lights etc) are switched off within both vehicles, and turn off the ignition.


2 - Attach the red cable to the positive (+) terminal on both batteries.


3 - Attach the black cable to the negative (-) terminal on both batteries.


4 - Make sure all connections are secure.


5 - Start the engine of the 'donor' vehicle and let it run for a minute or two whilst slightly pressing the accelerator pedal to raise the idle speed, during this time the dead battery will begin to charge.


6 - Attempt to start the 'dead' vehicle; if the connections are secure then there should be enough power to get it started, as long as there are no other problems.


7 – Leave both engines running for a few minutes


7 - Disconnect the black cables from both batteries first, then the red.


8 - Leave the engine running to allow the alternator to continue charging the battery.  If there is a red battery warning light on your instrument panel then there is a problem with the charging system which means that the battery will very quickly discharge again, the vehicle should be recovered to a garage to be professionally diagnosed and repaired.

Note - there has to be a cause of a battery discharging, this could be lights left on, faulty charging system, a current drain whilst the vehicle is off, or maybe just a worn out battery.  Make sure you find the cause or you could well find yourself in the same predicament.