If the battery light indicator is illuminated on your 2002 Kia, chances are that you have an issue with either the battery or the charging system. Sometimes this can be a simple fix, and other times you may need to replace the entire battery or alternator. You can troubleshoot a battery light with just a few tools. If you have just a bit of mechanical ability you can even solve the issue right at home.
Raise the hood on your Kia and locate the battery. The battery is on the front left area of the engine compartment. Wiggle the battery cables to see if they are loose. If you have a loose cable, then that will cause the battery light to come on. Tighten the terminals with the end wrench set.2
Look at the battery cable connections. If they are coated with corrosive material, that will cause the battery light to come on. Clean the terminals with the wire brush.3
Plug your alternator tester into the cigarette lighter and start the vehicle. The tester has lights that will indicate if the alternator is charging the system properly. If it reads low, then you need to replace the alternator. If the tester reads good, then move on to the next step.4
Attach the battery tester to the battery. One connection is black and one is red. Attach the red cable to the positive side of the battery and the black to the negative side of the battery. On the tester you will see a green area for good and a red area for bad. If you see that the tester is reading red, then you need a new battery or a charge. Chances are that the battery needs replacing.