Question about 1998 Jaguar XJ8L

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1993 XJ6 Jaguar has a flat battery every morning

Every morning the battery of my XJ6 is flat, I have had the vehicle checked out by an auto-electrician, and no discharge evidence was found, the battery is only 18 months old and appears to be fully charged , but is flat in the morning

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Hi

Disconnect battery overnight, if flat in the morning, fit a new battery !

Good Luck !

A Fixya rating would be nice thank´s...John.

Posted on Feb 20, 2009

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Why does my car battery drain overnight


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I once had a car that needed the battery charging every time just in order to start it. Once running, there was a misfire. Then the battery was too flat to restart the car. It was an alternator fault.

Disconnect the plug/wiring from the rear of your alternator FIRST. Charge the battery. Leave the plug DISCONNECTED from the rear of the alternator. Start your vehicle.

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It doesn't sound as though you have a big problem .. just one of the many 'irritations' that we motorists suffer...

If the problem is the alternator there's no need to replace the whole unit - you can replace the rectifier pack on the rear. If it is the battery at fault (an auto electrician will tell you within seconds) .. well, that's life.

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With a full charge the battery needs to be load tested, then a draw test needs to be done, to determine where the draw is, when vehicle is sitting. Auto electrician should know how to isolate draw. If you decide to try it yourself, buy a 12v test light & get back to us, we'll explain how to do it.

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