Question about 2004 Kia Optima

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Need new alternator

Is this a difficult job?
Any help? diagrams available on the web?
Car will run off battery but will not charge battery, usually thisw is alternator, agree?
Thanks
Tim

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  • Anonymous Dec 06, 2008

    show diagram where the alternator s located on a 2004 ka optima car

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No very easy

Posted on Sep 05, 2008

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1993 cadillac. I'm having trouble with the charge light coming on, only at night causing the headlights to go off and on. been pulled over 3 times now. The battery is new, had alternator tested and te


Could one WHAT be overcharging the other WHAT???

To understand the problem you must first understand that the car runs off of the BATTERY. The job of the alternator is to replace the power that the car uses back to the battery. The car DOES NOT operate off of the alternator (many people do not get this). The charge light comes on when the charging voltage from the alternator is lower than the voltage that is available at the battery posts (that is why the charge light is ALWAYS on when the ignition switch is on but the engine is not running.

If the CHARGING SYSTEM had been PROPERLY tested, you would have seen this in the tests. If you removed your alternator to have it tested, this does not test the charging system in the car.

This can be caused by a failure or high resistance in ANY PART of the charging system. This includes not only the battery and the alternator, but also all of the connecting cables, wires and the ignition switch.

If the battery and alternator are both good, then the problem is most likely a loose or badly corroded battery cable. However, high resistance in the ignition switch circuit to the alternator can also cause this type of problem. The charging system in your car needs to be PROPERLY tested to pinpoint the location of the fault.

Dec 03, 2011 | 1993 Cadillac DeVille

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Two new alternators on and the car still will not charge and it kills alternator. Need to know what to look for in the wiring harness. Auto Zone tested alternators before installation. Still won't...


Go to web site WWW.HMASERVICE.COM and register your vehicle by VIN #. You'll then have access to shop manuals, wiring diagrams, technical service bulletins, illustrations, etc.
Provided there is no problem with the vehicle's wiring, find out what the charging current is to the battery. I've seen batteries which TEST good, but when under a CHARGE short out internally.
Example: Tested a battery & charging system on a Hyundai Elantra, the battery tested "Healthy" but indicated there was a CHARGING SYSTEM PROBLEM. I checked the battery voltage while the engine was running and found the battery voltage at 14.3 VDC (which was normal). I then used a Digital DC Clamp meter arount the positive (+) battery cable & found the battery was charging at 70 Amps!.. it was supposidly already fully charged (should have only been taking 4 to 6 amps when fully charged).

Best guess without looking/diagnosing the vehicle myself

Maybe this will help.

Jun 30, 2011 | Hyundai Elantra Cars & Trucks

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New battery. abs, battery and service engine lights come on. all headlights and tails flicker and car dies and wont start. jump it let it warm up and doesnt do it for awhile. then at some point it does it...


These are all signs of a bad alternator. The car is running off of only the battery. The alternator charges the battery and keeps the car running. When the alternator quits charging the car will run fine until the battery dies. Then you can jump the battery and charge it, and the car will run fine until all of the electronics and lights run the battery down again.

Jan 25, 2011 | 2000 Pontiac Grand Prix

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I can boost my car and it will run fine then I turn it off and it wont start again is it a battery that needs to be replaced


this sounds like a bad alternator, that is the job of the alternator besides powering your car after start up, the alternator should keep the battery charged, believe it or not cranking your car is the only job your battery has unless you just switch you ignition to accessory, once you start the car everything runs off the alternator , a quick test for the alternator is this , crank the car and very temporarily unhook the positive battery cable, if the car does'nt die after 2 or 3 seconds the the alternator is putting out a charge

Jan 14, 2011 | 2003 Pontiac Sunfire

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Car will not start without a boost. Once it does start, the engine putters and turns off after a couple of minutes. Once the car is off, when I attempt to turn on the flashers or power up the windows, I...


The flashing lights seem to be a common issue when the battery charge is low. From your description the battery may need to removed, charged, and tested possibly replaced. If it does require replacement you may want to have the starting /charging system checked. If there is an Autozone,Advanced Auto,or O'reilly's available in your area they will typically check this system out for you at no charge.

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Brand new battery,drove car about two days and the lights got very dim,stereo turned off,no accellaration,and now dead.(1994 mitsubishi mirage 1.8 liter)


It sounds like the battery has gone dead and will need to be replaced due to a bad Alternator. Once you get the car started, check the voltage on the battery, there should be 13.5 to 14.5 Volts. A fully charges battery should have 12 volts with the engine not running and once the engine is running there should be 13.5 Volts with the head lights on and heater on too. If there is less then 12 volts reading on the battery with the engine running, then replace the Alternator. You can pick up a Alternator at Auto Zone and they can give you the step by step instructions to replacing it with common tools and they can also check the Alternator in your car to before you buy the new one. Good luck and hope this helps and insect the wire harness from the battery to the Alternator, look for any sighs of damaged like corrosion and repair any damages to the wire harness.

Dec 14, 2009 | 1994 Mitsubishi Mirage

1 Answer

I RECENTLY had my engine replaced in my 2001 hyundai Elantra. This 'new' engine supposedly has only 10k miles on it. A new alternator had to be installed.The work was done by the dealer. I have had the...


The odds are the alternator is the problem again. I've installed brand new alternators in the shop that turned out bad. The battery barely had enough juice the crank the car and get it running. Then, the battery was the only thing keeping the engine running with the spark plug until the battery drain completely dead.

If the alternator was working normally, the alternator would have kept the energy up and keep the spark plugs going without the battery's help.

Basically, the battery's job is to start the engine only and the alternator's job is to keep the battery charged and supply energy for the car's needs.

Nov 29, 2009 | 2004 Hyundai Elantra

1 Answer

My vehicle has started cranking a little slower than usual and the service engine soon light has come on what does this mean?


The battery may not charging fully due to a faulty alternator. Charge the battery overnight at 4 to 8 amp rate, then try the starter. If now better, test the battery voltage with engine running. You should read 13.5 to 14.5 volts at the battery posts. If near 12.6 volts, the alternator is not doing it's job. Take the car to your favorite auto parts supplier and have them test the alternator on the car. They usually do this for free as they hope to sell you a new part. A code scanner can clear the pending fault signal from the computer after the repair. Hope this helps.

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Replaced battery, started 5 - 6 times, new battery ded.


Nope, but they are usually near the battery, solenoid or starter (where main service wires are)

Mar 22, 2009 | 1987 Ford Ranger

1 Answer

88 ford thunderbird the alternator shorted to the case and smokechecked. replaced the alternator, alternator works but is not doing its job, car runs off of the battery alone. need a wiring...


Had the same problem. Likely the fusible links. Get a Haynes manual with wiring diagram in the back (should be around $15 or so at an auto parts store). I also had to replace the air intake duct and several components of the thermactor air system. One other thought is that the new alternator is not putting out a charge, you might want to check that if you believe everything else is okay. I once replaced an alternator and the new alternator was defective. --Mark http://www.marksatterfield.com

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