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Posted on Feb 16, 2009
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Battery keeps draining

Replaced battery & alt about 3 months goes by and battery is drained

  • 2 more comments 
  • Anonymous Apr 05, 2009

    I use my care on a daily basis, but my battery continues to go dead if I leave it for more than a day and a half. We notices that the interior light would come on when no one was even near the car. We did instaff a shut off switch to the battery as a fix but it is kind of a hassel.

  • danagauthier May 06, 2009

    I have the same problem on a 2000 Continental, but it's intermittent. The battery has been drained for 3 of the last 5 days. The dome light goes on and off of it's own accord. I've heard the door switch that informs the light control module can get gumed up, so I'll try that, but it sounds like a long shot.

  • Anonymous May 11, 2010

    Do you have access to an amp meter and know how to use it?

  • Anonymous Mar 31, 2014

    Replaced battery and alternator no fuses replaced yet

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  • Posted on Feb 16, 2009
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Joined: Feb 16, 2009
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Are you not using it for three months at a time? if so it could something as simple as a clock draining the battery, i would disconnect the battery if you are not using it for extended periods of time

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0helpful
2answers

2005 Kia Sedona EX having charging issues. Battery was replaced in September last year.?

the evidence above is not enough.
my guess is battery voltage drops everyday car sits unused.
yes?
then we call that PHANTOM drain.
alt 13.3 to 15volts is good.
you have drain, that is illegalll.
bogus drain, a current drain fault
a real shop finds this 2 ways,
1: ammeter test.
2; or pulls fused 1 by 1 until drain falls below 0.050 amps, 50mA.
lacking an ammeter, makes finding it impossible blind
he meter unblinds the tech hey see the drain and find it.


ok test 3 no tools (luck happens)
dead night, no lamps street , driveway or garaged.
wait 30min for eyes to go NIGHT VISION (you in dark room)
now go to car and look ever inch for a lamp glowing
inside and outside. find it.
if the dome lite is on , bingo. and glove lamps. hood and trunk , dash and more, luck happens even just eyeballs.
1helpful
2answers

I have a good alternator a new battery but if let my truck set for week with out driving it the battery goes dead and the radio is disconnected

The diode is bad and causes the alt to drain batt. Replace alt. But first chec if any lites etc are on. Unhook batt if not in use
1helpful
1answer

1993 ranger supercab charging guage remains high all the time. When not started for a few days the battery will die.

Seems that you have a power drain. If you installed any electronics check to see if the wire has an open section that is bleeding the system.
Check to make sure that when the glove box closes the light in side goes off. A sprung glove door will keep the light on and will drain a battery in about 3 days.
If you put a trailer hitch on the truck make sure that the grounding is done correctly. Lighting harness to trailer, trailer to truck. A poor ground will cause the electrical leak and drain the battery if the trailer in attached for a few day, less than 3.
0helpful
1answer

Battery keeps draining already put in a brand new alletantor and brattery still draining and battery lights comes on and truck won't start

You would have checked the charging system before replacing the alternator, so I will assume the charging system is good.
If the battery is being discharged overnight or over a few days, you would need to disconnect it and check every circuit on the truck to find the drain.
0helpful
2answers

My 98 lumina has a constant power draw from somewhere. I just replace the battery and had the alt tested (it was good). I have to jump the dang thing every morning but if I drive it enough during the day...

The alternator may charge fine but could drain the battery through a bad diode,have you checked the alt for a bad diode?Disconnect the battery positive cable.Put a regular 12v test light between the battery positive post and the positive battery cable.If the test light is bright you do have a drain,if dim it is OK.A dim light may mean the drain is internal in the battery.If you do have a bright light remove a fuse ,one at a time from the fuse box until the light goes dim.Once dim you have identified the bad circuit.If removing all fuses do not dim the light,disconnect the alt charging wire at the alt,if that dims the light,then you do have a bad diode.DO NOT create a drain(bright light) when checking for the drain by turning on the key or opening a door/trunk etc.
Also,do an overnight battery check by disconnecting the battery overnight,if things are fine the next morning after the battery was disconnected then it is a drain in the vehicle,if the battery is dead even after being disconnected overnight,,then the battery is bad.
0helpful
1answer

Battery dead, jumped car, started but had to keep the gas on or car would kill...replaced batter just a few months ago

check your alternator its what keeps battery charged if the alt is defective it will not charge battery draining it fast..
1helpful
2answers

2003 ford f250 battery keeps draining down already put in new batteries same problem what could it be

There is a set of Diodes in the Alternator, when these are shot, the battery will drain even though the key is turned off. I went to the auto wreckers and took 4 sets off of other alternators and swap them out when this happens. (about every 5 months) Look for a small plastic cap on your alt. and remove it and the diode set underneath the cap and replace. easy peasy. Good luck.
2helpful
1answer

I have a slow drain on my car battery. I puller

Use a 12volt test light between the positive battery post and the positive cable with the positive cable disconnected from the battery.
Keep key off.
You will see the test light "light" with any drain.

Any drain showing a dim test light is..... OK
Any drain showing a bright light is.....BAD

Disconnect items (fuses) one at a time and watch the light.
Keep the doors closed....the inside dome light is a drain with the door open!
After fuses are checked....disconnect the alt if needed and watch the light.
Keep going until you get rid of the bright light.
4helpful
2answers

Nissan Wont hold a charge

Hi. this is defiantly a slow or major drain that is occurring within this vehicle. Here is a test that you can preform that will help you find this battery drain so you can illuminate this issue.



--BATTERY DRAINAGE TEST PROCEDURE--


Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.


Please rate and god bless:)
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