Question about 2003 Hyundai Tiburon

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My 2003 hyundai tiburon wont hold a charge, I used a volt meter and the alternator charges it at above 13.5 v but after an extended drive it always fails to keep charged, can heat be an issue within the alternator?

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  • carhob May 11, 2010

    have u tested batt.,do u have to jump start car at first start up,does batt. light come on?

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  • 51 Answers

That sounds like your battery... do you have an alarm or amplifire not running off your accessories? or could be a faulty battery

Posted on Jul 06, 2009

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I'm not sure if you have all of the info you need to go forward with this.
The battery may be rated for 800 amps but could have less than 12 volts if the alternator is not charging it.
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well are you sure that you have a good or it just shows the correct amount of voltage. which that should 12.6 volts for a fully charged battery. to actually answer your question, (assuming)
you do have a good battery your alt. shouldn't keep it from cranking unless it is locked up, but you would use a digital volt meter and select the d.c. volts setting touch the red (positive lead) to the red (positive post) on the battery and the ground ( black lead ) to the ground terminal on the battery (negative post). it should read very close to 14 volts. if not check to see if you are getting voltage to your alt. by using your volt meter to test the power wire going to your alt. it will be the one on the backside of your alt with a protective boot over it. with your volt meter still set on dc volts touch your black lead lead to a good ground and your red lead to your power wire going to your alt. it should have 12 volts there. if not check your fuses. if your car clicks when you try to start it then you may have a bad battery connection. dirty terminals with corrosion built up on them will do the same thing. also a starter that is bad will click because the bendix can't kick out to engage the flywheel to turn your engine over. well hope i answered your question and then some.

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Hello and good morning. Couple of things going on. First, alternator isn't charging, or is it.
Lets check the alternating output (battery positive and negative post). Take a cheap voltage meter and set it for DC volts around 20 volts on the scale. Place the test leads across the battery while the engine is running. The voltage across the battery terminals should be 13.8 DC volts to 14.1 DC volts. If you are getting this reading in volts from the multi-meter then you vehicle is charging correctly.



Next, check to see if there is a ground wire on the alternate it just a breaded copper cable the is hook to the case of the alternator to the engine block. If there is a ground cable, then that is OK.



Now, let check the tension of the alternator serpentine belt, it need to tight but extremely tight. Also check the condition of the belt. If it has cracks along the inter ridges of this serpentine belt then it needs to be replaced.



Any of the three things mentioned above can and will give problem to your vehicle. Also, any combination of the three above. Wish you luck. GB...stewbison

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