Question about 1996 Jeep Grand Cherokee

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Battery keeps going dead - 1996 Jeep Grand Cherokee

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Battery water can be the problem. That is, you can keep jumping it but if the water level is not high enough it will not hold the charge. Also it can short out. Get some Distilled water at the supermarket
and pour it in each of the cells until it come up to the ring below the top. Not all the way to the top.
Wear Gloves and rinse your hands off to remove any battery acid.
If the battery is good and it's down anyway and not being charged. Here are the things that cause it. And the things that don't.

The voltage regulator controls how much electricity is used to charge the battery and how much is going into the electrical system of the car. The electrical system may has been designed to integrate the voltage regulator into the case of the alternator. If that is the issue, the alternator can be replaced, or if there is a skilled person that does rebuilds in your area, he will know how to change the diodes in the voltage regulating section of the alternator. You can save money this way. If you have a volt meter or a multimeter. Commonly around $25.00 these days, you should get a reading of around 12 volts from the battery when it is charged and the engine is off. If the battery is down, the voltage should still be in that area, but not enough of a kick behind it to do anything but light a small bulb. When the car is started and the voltage regulator is doing it's job you should get at least 13.5 volts DC at the battery terminals.

Many of the symptoms that occur also happen because of poor electrical contact at the battery.
Use Baking soda and water to clean the terminals of the battery of corrosion. And then use a battery cleaning tool for the battery posts and the battery wire clamps that go around the post. Make sure all of the connectors and wiring is sound.

I would then test all of this doing the following steps..

Charge up the battery.

Then connect the system and do the voltage checks. If the Battery is charging properly, the regulator will gradually reduce the charging voltage it is using to charge.

After 15 minutes, shut the engine down and check the battery voltage. and turn on the headlights to see if they are still bright.

If the voltage is at 12 volts DC the battery will live. If you are not getting enough charging voltage, which I believe is the situation then the voltage will constantly be to low at the battery. It will be the battery running the car and the bulbs and other things will go lower and lower.

One very simple test of a charging system is to charge the battery, start the engine, then pull the positive terminal off of the battery. If the engine dies, then the voltage being generated from the alternator is too weak.

Hope all of this helps,
Happy New Year,
Mark

Posted on Jan 01, 2011

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Chech your altinater

Posted on Jan 01, 2011

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