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Battery draining overnight

Hell my 2001 disco td5 battery drains over night i have put a new battery on it and tested the alternator and its working fine help thanks

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

The Machine
  • 788 Answers

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

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

TheComforter
  • 18 Answers

SOURCE: 97 nissan sentra put new alternator and battery car wont start

are you sure the alternator is good? because it could be tricky ...The only other thing is the wire running back to battery pack to charge battery maybe disconnected

Posted on Jun 16, 2009

morse008
  • 1111 Answers

SOURCE: Draining Battery on 1996 Ford Contour

you will need to do a test with a battery light disconnect the negative wire on the battery and connect one end of the test light to the battery and the other to the terminal with everything switched off if the test light is lit you have a draw if it is not lit then it is something else sometimes door switches and glove box switches wear out and need added lift to properly shut the open circuit down

Posted on Aug 26, 2009

jturcotte
  • 7710 Answers

SOURCE: ford F150 2002 drains battery overnight, new

Please see my tip at http://www.fixya.com/cars/r5925550-dead_battery_troubleshooting . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 03, 2010

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1 Answer

06 bug drains battery over night


On most 12v cars,the #1 cause is a light left on somewhere in the vehicle.#2 cause is a bad diode in the alternator and #3 is a bad battery which self discharges and is usually over 5 years old.
An easy first step is to disconnect the charged battery over night.If it still has a full charge the next morning,after you reconnect it and if the car starts,you can rule out the battery as the culprit.Now,if the battery passed the first test,now we go onto #2 test and disconnect the alternator output wire from the alternator overnight.If the battery still has a full charge the next day we will now know the alternator has a bad diode and will need to be repaired/replaced.If the battery was found to be low on charge the next morning with the alternator disconnected we will now have to go on to test #3 to find the drain in the vehicle. Disconnect the positive battery cable and place a 12v regular bulb type test light between the positive cable and the battery positive post.You should have a bright light on the test light if you have a drain in the vehicle from the battery.(don't worry about a dim light as electronics need a little memory voltage) We are looking only for a bright light.With the key off (as it would be overnight) you are now going to remove one fuse at a time while watching the brightness level of the test light.Take one fuse out, look at the light and if no change in brightness put the fuse back in and on to the next fuse,one by one until you see the light go out or dim.The fuse that dims or removes the bright test light will be the circuit that is draining your battery.Now you have your "battery drain" circuit identified and can inspect/repair the item/items on that circuit.
REMEMBER an open door,trunk or hood may cause a FALSE bright light on your test light because of courtesy light switches and alarm switches so manually close those switches if you need to keep one of the doors or hood/trunk open to gain access to the multiple fuse boxes in many vehicles.
DO NOT TURN ON THE KEY during this test, as all power to the vehicle is now going through the test light and things won't be happy if you do.

Apr 09, 2017 | 2006 Volkswagen New Beetle

4 Answers

Car Battery draining over night


Something is draining the power I recommend you take it to a mechanic or a friend to be checked, hard to say what may be the problem without looking around.

Clearly something is draining the power.

this may be helpfull
http://www.wikihow.com/Find-a-Parasitic-Battery-Drain

Jun 09, 2008 | 2001 Nissan Altima

1 Answer

04 Tundra battery draining overnight


Did you let the vehicle sit for 30 min. before testing ? Modules need to time out (go to sleep - power down etc.. How are you testing ? Have a ammeter inline with battery negative cable and negative battery post . Have any doors open ( door switch closed ) Key out of ignition ? How much current ? 50 milliamps max !

Dec 19, 2016 | 2004 Chevrolet TrailBlazer

1 Answer

What possible way can check to tell if my overnight battery drain is due to the diode sticking? Is there a test or a tip you could offer? The battery is new and the alternator tested ok.


A diode doesn't "stick". Either one of your circuits is using battery overnight, the battery is defective, or it's not charging.

Assuming the battery is "good", pull all of the fuses overnight. If it's good in the morning, put all the fuses back in, and next night leave one in. Next night, the next fuse, etc.

Once you know which circuit is draining your battery, you can troubleshoot further.

Sep 15, 2015 | 2008 Pontiac G6 GT

5 Answers

Can a bad alternator cause a battery to die overnight?


A bad alternator no longer charges the battery, the battery will die once it is drained. This will occur more rapidly when using equipment that runs off of the battery( lights, heater blower, windshield wipers etc.) even electronic ignition will run down a battery. Your battery just went over night the alternator may have stopped working long before. Go to an auto parts store that offers free testing to make sure it is your alternator before making repairs.
Good luck.

Apr 20, 2015 | 2003 Chevrolet TrailBlazer

2 Answers

Why does my 96 Cadillac Eldorado battery keep discharging?


First step have the battery tested, a bad cell can cause a internal drain and kill the battery, if the batt is ok then check for interior lights like visors that stay on or interior light that come on by themselves at night due to defective door switches.

Dec 27, 2012 | Cars & Trucks

2 Answers

My battery keeps draining down at night it's a 99 dodge durango


you have something draining the battery,check for any lights that might be staying on,interior light,stop light under the hood light(if any),glove box light trunk light, if you have a multimeter with amp testing capability or an amp meter you can check where the drain is by removing each fuse & put the probes on each side the terminals until you find a drainage,that way you might be able to find out what is draining the power & rectify it......hope this helps......cheers

Jul 28, 2010 | 1999 Dodge Durango

1 Answer

I have a bmw 2001 330ci convertible which had the alternator replaced twice in a month and half.the mechanic is claiming that there is an electrical problem and he cannot figure it out and to go to the bmw...


it seems like something is draining your battery while the car sits overnight. causing the battery to get weaker and weaker putting stress on the alternator making it fail prematurely. the dealership will do a paracidic drain test where they'll find out what is draining your battery while your car sits overnight. it could be a bad module somewhere that's staying on when it shouldn't be.

Feb 17, 2010 | 2002 BMW 5 Series

3 Answers

My 96 Chevy Lumina 3.1L battery is being drained of its power.


the diodes in the rectifier have gone renew the alternator ,or it will just drain battery overnight

Jan 12, 2010 | Chevrolet Lumina Cars & Trucks

1 Answer

Brand new battery, wants to turn over but keeps losing its charge, the break lights only turn off if you lift the pedal after u use it, alternater belt squeaks a little. wat could cause this when the...


Well, if the alternator belt squeaks a little, it cannot be actually charging properly, resolve that...

First steps would be to fully charge the battery and measure the voltage. Turn of vehicle Disconnect the negative terminal overnight, for a night or two.

If battery still dead, focus on the battery.
If battery is not dead, put a volt meter between the negative terminal and cable and measure voltage... do not be mislead by interior lights, or clock, pull those fuses, during testing...

Anyways, keep going until you find a drain.

The alternator has diodes that can cause a drain...disconnect for testing purposes...

NEVER run the vehicle with the battery cable dicsonnected.

Doc

Sep 16, 2009 | 1984 Oldsmobile Delta 88

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