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My 2001 renault scenic battery keeps draining overnight i have had it checked and no drain found alternator working fine and new battry bought but problem still exists any ideas please

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  • 94 Answers

There is a drain somewhere. do you have any aftermarket parts on the car, like a radio, security system? check those. also check that interior lights aren't left on, also check the boot and make sure the light isn't on there.

Posted on Nov 10, 2014

Testimonial: "i have had the car diagnostically tested and it showed no drain everything on the car works fine but this still happens overnight its baffling me i thought it might be the cd multichanger so i discconected it its factory fitted not aftermarket i have no aftermarket parts on the car whatsoever i have removed fuses one at a time and left it overnight but it has not resolved the problem."

  • 2 more comments 
  • truedoom Nov 11, 2014

    an additional bt of info i found, it's for a newer scenic but could be relaed.

  • truedoom Nov 11, 2014

    an additional bt of info i found, it's for a newer scenic but could be relaed.

  • truedoom Nov 11, 2014

    https://uk.answers.yahoo.com/question/in...

  • truedoom Nov 11, 2014

    seems the alternator can go bad, and start discharging the engine

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SOURCE: Car Battery draining over night

Something is shorted and it could be very difficult to find sometimes. It could be something as simple as a button being pressed when it shouldn't turning on a light or feature that runs all the time, but in a 2001 that is unlikely as it should turn off all lights after a certain period of time. It could be something in the radio. What I suggest is to pull one fuse at a time for accessories, check your manual for what each fuse powers. If the battery still drains with that fuse out then put it back in a pull another. When you find the fuse that allows your battery to keep it's charge then you will have a much smaller field of offending components.

For example, if you pull the fuse that powers the radio and heater, and the battery keeps it's charge then you know it is either the heater or radio causing your problem.

This can take a few weeks to do completly but won't cost you a penny to do.

Posted on Jun 09, 2008

  • 9 Answers

SOURCE: My battery drains overnight

Check and make sure the Air Condition cluch is disengageing, I had the same problem afew years back.

Posted on Dec 06, 2008

  • 71 Answers

SOURCE: battery drain

650 milliamp is too much. The Beetles had problems with the microswitches in the door latches that tell the convienience module if the doors are opened or closed. If it doesn't see the right signal the computer wont go into sleep mode an it will stay powered up draining the battery. VW techs can check the output of these switches to see if they are working right with their scan tools.

Posted on Dec 11, 2008

motor1258
  • 6674 Answers

SOURCE: My battery drains overnight

Connect a 12 volt DC test light between battery cable & post on positive terminal.(remove terminal) (inline) When that light is on, there is a draw. Radio memory, alarm/antitheft systems, etc will cause a draw, so make notes & pull them first. Light will be dull on low draw, bright on high draw. Watch light closely & start pulling fuses, when you see it dim down,or go off you;ve found a draw. If no change, put it back in & continue. I usually start with the suspected draw spots like listed above, and accessories fuses.(like a cigarette lighter stuck in.) If all else fails, I've had to remove all the fuses then start replacing one at a time, until light gets bright, to point me in direction of major draw. Don't be proud, if you don't think it's labeled well enough for you to remember where they all go, make your own drawing & notes. Keep me posted of your progress.

Posted on Apr 04, 2009

  • 1 Answer

SOURCE: 2006 Chevrolet Trailblazer. Battery Ok.

Hallo

have the same problem with my Trailblazer, has someone a solution ?

Posted on Jun 03, 2010

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Probably something draining the battery overnight. Interior light left on? The regulator in the alternator could be bad and keeping the ignition energized draining the battery. If your jump start it drive to work get off work and it starts after 8-9 hrs you have a system voltage leak some where. If nothing is left on overnight have the voltage regulator tested in the alternator.

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