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My son has a 2000 Hyundai

And i bought a new battery it started fine so i turned it off the next day ( today) i tried to started and it dont start i hooked it up to my battery charger and it started right away what could be the problem? battery terminals are new and in place right and tight

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  • 38 Answers

Make sure you have a ground wire going from the battery to the body. Also if the voltage regulator is bad on the alternator it can put out 14+ volts when running but when you shut the car off it can pull the juice back out of the battery.

Posted on Dec 03, 2012

  • jesse Dec 03, 2012

    thanks ill try that.. this problem started yesterday as soon as i hook it up to my battery charger it starts fast

  • lacrow146900
    lacrow146900 Dec 03, 2012

    A bad voltage regulator can pull the surface charge off a battery in a matter of hours. When you hook up the charger your just giving it that surface charge back. Im really thinking its the alternator.

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The horn relay is stuck. The fuse box is right by the battery, remove the horn relay (it pulls straight out) and replace. The guide is in the lid. Removing the relay (or the 10A fuse, tool is also in the box) will stop the horn, but the relay's contacts are probably locked.

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SOURCE: Intermittently have to use charger to start.

the most common cause of this by far is lights left on by defective switchs, these include the map lights in the visors, the glove box light due to a defective switch, the trunk light and the hood light if equipped, check it at night and look for a faint glow, the other much less common cause is the alternator has a defective diode and allows a small current to pass to ground drawing the battery down..

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You should check your battery cables with an ohmmeter and see if they have any resistance,they should be at 0 ohms or just alittle over,but could possibly be the starter solenoid also.I had this same problem with my Toyota last year,hard starting sometimes needed a jump and then the alt went bad,turned out to be the solenoid was shorting intermittantly.Hope this helps.

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