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Car Battery goes dead overnight - Nothing been left on

 
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AlexR AlexR
New User | Posts: 1 | Joined: 11/06
Posted: 11/01/06
08:30 PM

Can anyone help with this:

My girlfriend's car battery died whilst she was at work as she left her lights on. Not a problem I thought, jump started it fine and got it home. The next morning it wouldn't start so left a charger on it all day. The charge had no effect on the battery so went out and bought a new battery. Installed that last night and this morning it was discharged again and the car wouldn't start.

There was nothing left on in the car and I am all out of ideas?  

nickb2 nickb2
Guru | Posts: 816 | Joined: 08/06
Posted: 11/01/06
09:57 PM

You have a paracitic draw...check the amperage of the draw all off doors closed, hood lamp unpluged depending on the car(Allways post your car type, year, model, engine) most cars should have no more than 2-4 milliamps.


Nick
ASE Master Auto Technician, L1  
ASE Master Auto Technician, L1, ASE Certified Service Consultant, ASE Certified Parts Specialist, Chrysler Certified Service Manager/Technician

nickb2 nickb2
Guru | Posts: 816 | Joined: 08/06
Posted: 11/19/06
06:34 AM

Why do you say the alternator....that makes no sense...please dont post *** the alternator was going out the it would have a battery light on or would not run after a jump start

Nick
ASE Master Auto Technician, L1  
ASE Master Auto Technician, L1, ASE Certified Service Consultant, ASE Certified Parts Specialist, Chrysler Certified Service Manager/Technician

bijan666 bijan666
New User | Posts: 4 | Joined: 11/06
Posted: 11/20/06
06:36 AM

I had the same problem, I went through 4 new batteries in less than

a week untill following someone's advice I replaced my battery cables

and that solved my problem.  

jv-jb jv-jb
New User | Posts: 3 | Joined: 12/06
Posted: 12/21/06
05:19 PM

don't question a master tech man it's definantley a parasitic drain  

Blueassessor Blueassessor
User | Posts: 53 | Joined: 12/06
Posted: 12/21/06
06:10 PM

I've seen an alternator draw power. One diode's shorted caused it. Try turning all light's off including interior light switch or pull bulb. Set multimeter to amperage. Check to see if there is a draw. Some model use gem module witch you'll need to wait for it to cut out usally 25 minutes after that. Pull fuse one by one. One out then back in untill you see draw drp's out completely or by majority. Check to see what power that fuse supplies. It normally will point you to right direction. If you think it is alternator disconnect it.  

Blueassessor Blueassessor
User | Posts: 53 | Joined: 12/06
Posted: 12/21/06
06:17 PM

Before you do draw test check to see what charging at with and without load should hold around 13.5 volt's.  

nickb2 nickb2
Guru | Posts: 816 | Joined: 08/06
Posted: 12/22/06
05:08 PM

Here is the deal with this...when you have a battery go dead overnight it is either the battery (weak, shorted, etc) a paracitic draw (any draw on the battery car off doors closed hood light off all modules in sleep mode more than .02-.06 amps) the only way the alternator could cause the concnern is if it went out at just the right time to have you seep the battery down to which point is does not have the power to turn the vehicle over but still keep it running.  95% of altnernator failures will trip a battery light, you would also notice dimming lights or other low power indications.  
***People above need to look at the symptoms of a problem and if you are going to offer advice please make sure that it is informed**

Nick
ASE Master Auto Technician, L1  
ASE Master Auto Technician, L1, ASE Certified Service Consultant, ASE Certified Parts Specialist, Chrysler Certified Service Manager/Technician

beachthug4 beachthug4
New User | Posts: 1 | Joined: 12/06
Posted: 12/27/06
06:56 PM

Hey Nick I got a question for you. I have an 06 ford explorer and my batter keeps going dead over night as well. Should the amp pull be the same .02-.06 in my suv? Could a car stereo amp left on have enough pull to drain my battery? Many thanks  

nickb2 nickb2
Guru | Posts: 816 | Joined: 08/06
Posted: 12/28/06
08:33 PM

Draw should not be much more that .02-.06 amps, yeah a battery couldgo dead if an amp is left on.

Nick
ASE Master Auto Technician, L1  
ASE Master Auto Technician, L1, ASE Certified Service Consultant, ASE Certified Parts Specialist, Chrysler Certified Service Manager/Technician

NotOz NotOz
New User | Posts: 1 | Joined: 01/07
Posted: 01/20/07
09:04 PM

Ditto folks. Just because ONCE it happened to your wife's third cousin's neighbor's boss, doesn't make it a legitimate diagnosis.

Sorry, had to echo Nick on that.

Thug, funny you mentioned '06 Explorer. I have two identical '06 Explorers (work cars). Both are having problems with parasitic drain. Two different operators, identical cars. We've had to go out and buy jump start boxes to start our cars up. If it sits the entire weekend or drops down to 20 degrees or so, I'll be jumpstarting it on Monday morning.

Less than 10k miles.

Let me know if you figure it out.

Thanks,  

jwwebster jwwebster
New User | Posts: 1 | Joined: 01/07
Posted: 01/29/07
09:54 AM

Hello got a similar problem.

I have a nissan primera and the battery goes flat when left overnight.
I got a new battery and the same thing happened.
When I connected to the battery charger the battery is drawing 6amps from the charger and even blew the fuse at one point.
I also tested the battery and it is drawing 3 amps when the car is switched off and nothing is on.

What could be causing this?

Many Thanks  

AutoExam AutoExam
New User | Posts: 1 | Joined: 02/07
Posted: 02/01/07
07:18 AM

Could be an alternator with bad diodes.. This will not trip a light on the dash and the alternator will show good output with a voltmeter.. Take the vehicle to your local auto parts store and have them test the alternator on the car, most have portable testers like the bear arps that can test the diode pattern.  

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