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Battery dying then engine dying,alternator checked o.k

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Check if there is any short circuit somewhere.
A simple test with switch off, disconnect (+) battery terminal wire and observe any spark when trying to reconnect, or using an Ameter check if electric current flows with start switch at position off. If yes this will cause battery to discharge when you are not driving your car. Then your cars wire harness connectors, fuse box, etc need to be checked thoroughly by an expert. Good luck!

Posted on Sep 26, 2008

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If you battery is old it might need the lquid inside renewing, or replacing the battery. its a cheep way to see without getting to deep in to the electrics. anothe thing to try is leaving it "on Charge" for a good 24 hours.

hope this helps

Posted on Sep 27, 2008

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How can I check when the alternator is not supplying enough power to the battery,or when alternator drawing power from the battery I remove one terminal while the car idle it did n't die.I suspect


The alternator output must be more than 12 volts, usually +/- 14 volts. Measurements may be made with the engine running connected/unconnected to battery. Once the engine is running, disconnecting the battery will not normally cause the engine to die/stop. However, lights, radio, clock, and other accessories will not have power.

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did you check that battery is charging with a multi meter ? could be that your alternator has a fault . Icheck battery voltage with engine off and running , voltage should be approx. 12.48v with engine off and around 14v running . if no increase in voltage when running brushes in alternator will need replacing .

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The alternator is not working. When running, a voltmeter on the battery should be at least 13.5 volts, showing the alternator is working and the battery is being recharged. You have a charging system malfunction. check the connections between the battery and alternator. Check battery ground, engine grounds, and engine to body strap ground.

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Check to make sure the power lead from the alternator to the battery has a good connection. Sometimes the connectors get corroded, or the wire separates inside the insulation. You can check the wire for continuity with an Ohm meter...make sure to disconnect the wire at both ends when you use the Ohm meter.
Make sure the battery has a good clean ground. Make sure the alternator is grounded to the engine and the engine ground strap is intact and has clean grounds on both the engine and frame. Test the alternator with the engine running using a voltmeter across the battery. You should read 13.5 to 14.7 volts. If the alternator is not charging the battery will go dead under normal operation. If you don't get the correct charging voltage either your connections are bad or the alternator is bad.

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I have a 2006 kia sedona. the problem is that my battery suddenly died so i stared the moter with a jumper. when the engine started the ABS,BREAK,ESC lights came on. After the moter ran for an hour i...


It sounds like your alternator is bad. Here is how to find out:

Start your car (jump it if necessary)

Let it run - while it is still running - disconnect the battery cables from the battery.

If your car suddenly dies, most likely its the alternator.

If your car does not die after disconnecting the battery cables - then its probably a bad battery and your alternator is working fine.

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2 Answers

Battery Drain


It sounds like an Alternator problem.
Remember the Battery only Starts the vehicle and runs nominal operations. The Alternator actually provides the electricity to run the Engine operations. With that being said: Start the vehicle, jump start it if you have to. Remove the Negative Cable from the Battery or remove the jumper cables. If the Engine dies after doing this, the Alternaotr is bad and needs to be replaced. When the Alternator begins to die, it starts draining the Battery. During normal operation it is the Alternator that sends a small trickle charge back to the Battery keeping it charged-up.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

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1 Answer

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Check alternator output should be above 13.5 volts,charge battery fully then use a multimeter to check battery voltage...then start car and check voltage when running...should be higher reading running then when car is shut off...if not alternator maybe bad or wire not on right? Best of luck to you!!!!!

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