My battery is going dead while driving

2002 JEEP CHEROKEE
142,000 MILES
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MSJAYELLE
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My 2002 jeep grand cherokee keeps going dead. I have had the battery replaced & the neutral safety switch as well. It still is having the same problem. It will go dead while I'm driving or just not start all together. What else could be the problem? It will just go dead. Key turns over. All lights come on. It will just stall and sometimes go dead for no reason. Cant find the problem.
Oct 13, 2011 at 10:58 PM
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DAN_K
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Recheck all of your charging system connections. Perform voltage drop tests on the cables to determine and locate high resistance.
Oct 13, 2011 at 11:07 PM
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MSJAYELLE
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Do you have a rough estimate of the cost to have the things you suggested done?
Oct 13, 2011 at 11:52 PM
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CARADIODOC
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Also check the smaller red positive battery cable where it bolts to the under-hood fuse box. Shine up the terminal with sandpaper and be sure the nut is tight. Do the same for the smaller black negative battery wire that bolts to the body.

To do the voltage drop tests Dan_K suggested, that must be done while the problem is occurring, otherwise there won't be a defect to be found.
Oct 14, 2011 at 2:53 AM
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MSJAYELLE
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What is and how do you exactly preform a voltage drop test????? Connect cables to the battery and touch the other ends maybe?????
Oct 14, 2011 at 6:31 PM
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CADIEMAN
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check the charging system yes but im thinking you may have a draw on your battery check that to.they just disconnect the negitive cable at the battery.then hook a meter up in between the battery and the cable it cant be more than 50 milli amps.
Oct 14, 2011 at 7:04 PM