I have a 2000 kia sportage that will not charge. It has a new battery and alternator. When I start it up it has 13.5V, and after it runs 15 minutes the battery shows 11.5V. Is there some common problem with these to cause the battery to discharge when running.
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Re: 2000 kia sportage charging.
Hi check the main alternator charigng wire the comes out of your alternator see if it is sending a 14v no less reading on a multimeter if not replace the alternator if so go to your battery see if the multimeter readings are the same as the alternator if so do a battery discharge test if not trace the path of the main wire which comes from the alternator to the battery for breaks and all connections yates210456
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Well, the next question is, how is the battery getting charged or is it charged up enough? If it's not charged up as indicated by the Amp meter of a charger hooked up to house current, then the alternator may not be outputing enough current or voltage to charge the 1 year old battery up.
Try charging the battery up independently of the car's alternator to find out.
Your battery should be at 12 volts with the car off, higher when running. If you can't start it, pull the battery out and bring it to a parts store where they can check it's condition. This is a free service. They can tell you if the battery is just low charge (if so, you will have to check the alternator to make sure it's charging properly) or if the battery is shot, and needs to be replaced. Check the battery connections 1st, if they are corroded or loose it will not charge properly, and will not start.