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post #1 of 4 (permalink) Old 24th April 2009 Thread Starter
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clio battery light

mother inlaws clio 1.4 auto m reg, the battery light goes out after stat up and will sometimes light up whilst driving. put meter to battery and was ok and altenater was charging, this with no light lite. after some time i got the light to light up so i poped bonnet and pulled battery negative off. the car continued to run indicating alternater ok. later that day the light came on i tried thbe same thing with negative lead but this time the car died indicating no charge. put lead back on car would start and light stay on. it seems to stay off until the car heats up although a guess. i put other battery on and with light on sometimes its charging sometimes its not. would this be a faulty alternater or some wiring fault.

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post #2 of 4 (permalink) Old 24th April 2009
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Looks like you've done most of the investigation work youself !

It could possibly be a faulty alternator or maybe its wiring and or connections. I'd probably be inclined to check out the wiring to the alternator and its connector first as this is the cheaper option.

Its defo alternator related though mate by the sounds of it.

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post #3 of 4 (permalink) Old 24th April 2009
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Could be a duff brush or faulty earth in the alternator.

I personally wouldn't recommende disconnecting a battery whilst the engine is running as it could cause a voltage spike and Renaults definitely don't take kindly to such variations and have been known to damage the ECU
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post #4 of 4 (permalink) Old 24th April 2009
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I agree with madnoel10 Never disconnect the battery while engine is running. Usually it damages currently operating devices, and the one always operable while engine running is the computer, so you might be lucky not to have burnt it. The problem might be the brushes in alternator and/or the bearings inside, usually if the red light blinks it is so. You might also check the cables on the starter motor. If alternator, check for used one, or original renewed part at local dealer.
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battery , clio , light

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