Tip & How-To about 2006 BMW 650CIC

Door lock cause of dead battery

A dead battery, one recent cold morning, found me at the service shop. Tests indicated the system was charging properly with no battery drain. I asked if the test were done with the doors locked. They were not. A second test (car locked), revealed a misaligned trunk lock switch. Switch repaired, battery charged, problem solved.

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2 Answers

jeep wont charge


wow no year stated, nor car. a willis jeep> 1945?
in 1945 it has no Alternator !
General answer , for all cars:
dead parked, or dead moving ?
no person can help lacking that critical fact,
sounds to me like, impossible question !
if it goes dead moving the alternator /gen system is failing.
if the battery goes dead parked, that means you have phantom drain.

we can find out which it is , with a $10 DMM meter at walmart
$20 is a better buy.

so if it drains over night check for lamps stuck on.(aka. dark current)
if drain driving, then.
check for 13.3 to 15vdc, running, engine.
if low, the alternator system (charge) is failing
at no time did i say any part was bad or to buy them. (i never do until i do tests)
drains here.
http://www.fixkick.com/drain/drain.html
works on all cars.

moving dead.:
there are other rare causes..
like the engine will not idle at 800 rpm or more.
see this, the alternator goes off line below that much.
and can drain a battery fast deep in the city at infinite red lights
and traffic jams.
that is why getting a car with hands on service by a real ASE
tech, works best , he /she sees all this in 5 min flat.
saving all this grief.
like , oh crud, it idles a 500! (that be it)
or charge lamp is on?

the old jeeps love to kill batteries, with old DC generators. (ask)
oh my, the OBD2 scan tool says my ALternator is off line.
or other DTC errors, about power lost to many places.
use a scan tool if car is newer.


this car?
http://barrettjackson.com/staging/carlist/items/Fullsize/Cars/96748/96748_Rear_3-4_Web.JPG

sad the owner can't tell year or model.

Dec 13, 2014 | Jeep Cars & Trucks

1 Answer

2004 also


Take the SUV to an autoparts store that features free charging diagnostic tests. They will determine if the alternator is putting out sufficient power to recharge your battery. There's also a very good chance your battery is dead. It's not uncommon for a battery to need replacing (especially in a truck with all the bells and whistles I'm sure the Santa Fe has) after 4-5 years. It's also important to ensure there's no corrosion around the battery posts/cables (will have a white or green powdery appearance). Corrosion would prevent the battery from accepting a full charge.

I hope this clarifies your problem. It's unlikely the alarm system is the culprit provided it's not "going off" all day long. Best of luck and please feel free to post back with any other questions.
Greg

Jun 12, 2009 | 2007 Hyundai Santa Fe Limited

1 Answer

unable to crank after sitting


Interesting problem. There are a number of things that can contribute to these symptoms: Battery not holding charge, charging system not working, bad/corroded battery and/or starter cable connections, and of course something draining the battery when the ignition is off.

Before doing these tests, make sure the battery is fully charged by disconnecting it from the car and charging it 24 hours with an external battery charger.

Is the charging system (alternator) working? Accords have an idiot light, not an ammeter/voltmeter, so it could be your car isn’t charging and the indicator light is burned out. Connect a voltmeter to a fully charged battery and observe the voltage (should be about 13.8 volts). Now start the car and observe the voltage again, should be higher than before (around 15 volts). If the voltage doesn’t increase at least slightly either the alternator belt is loose and slipping or the alternator is bad.

Are the battery terminals tight/clean? Any corrosion on the terminals or wires? How about the end that connects to the starter? How about the ground wire to chassis? Any corrosion could produce an intermittent connection problem that acts like a dead battery.

The battery may be new…but is it good? Charge it, connect it and confirm the car starts. Then DISCONNECT the battery, let sit 24 hours, re-connect and try to start. If the battery now acts dead maybe it is bad. Exchange under warranty.

And last, something is discharging the battery. First question, do you have any non-Honda add-ons like an aftermarket audio system with a power amp? Audio power amps have a direct wire to the battery for greater power, if the amp isn’t turning off then you’ll have a drain. Try disconnecting such equipment and see if your problem goes away. If that’s not it connect an ammeter in series with the battery with the ignition OFF and start pulling fuses one by one until you find what’s causing the drain.

Hope this helps!

Jan 27, 2009 | 1988 Honda Accord 4 Door

1 Answer

Battery keeps going dead. Especially if car not driven for day or two. KIA ran checks of electrical system but found nothing. Am on sixth battery. Newest one only 3 weeks old and went dead over weekend.


it may maybe that the alternator doesnt give out the specific amount of electricity to properly charge your battery. you may have to run some tests on the alternator itself to see if it is giving out the proper current to charge.

Aug 06, 2008 | Kia Optima Cars & Trucks

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