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post #2 of (permalink) Old 4th September 2009
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Originally Posted by tamarvalley76 View Post
hi , i have a 96 megane coupe with constant battery drain, i have had immobiliser probs so had ecu decoded, for 100 result !!! but even before then i was suffering with battery drain, i have been living with it, ( as long as i use car daily) but its driving me mad!!! any help ??? thanks.

Provided the battery is in good condition.

It is more than likely your Alternator.

Had this before on Meganes.

To check if it is:-

Make sure battery charged.

Disconnect battery earth cable.
Remove cables from the alternator, insulate the ends and secure them so they cannot touch any part of the vehicle.
Re-connect battery earth cable.

Leave alone for the same time (or preferably longer) than you would have expected the battery to drain before.

Disconnect battery earth cable.
Re-connect alternator cables.
Re-connect battery earth.

If it has lost no charge then it's the alternator.

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