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  #1  
Old 11-29-2014, 06:28 PM
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Low Battery Warning

I didn't go anywhere for the last 3 days,so my car was sitting on my garage for 3 days. This afternoon before I head out, i got a message from my car's Viper SmartStart app my car has a low battery. I am sure nothing was running except my dash cam that was connect to a UPS unit and would automatic turn off after 24 hours if my car has not been active. My car was also sit for a couple months in the garage back in August to late October. Does that mean I have a bad battery in my car. When the car is in ACC, It only has <8V, and on RUN with the engine off, It show 12V. When the engine is on it shows 14V on the dash. I do check on the battery using a meter with the engine off, It show 12.5V. Do anyone of you experience this before? If so, what is the solution? If I need a new battery, what kind of cost I am looking at? Thanks.

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  #2  
Old 11-29-2014, 06:46 PM
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Re: Low Battery Warning

It's possible the battery could be going bad. There's also been an issue with the RA3/RA4 radios remaining on with the ignition off and draining the battery. You may want to check the 08 Electrical TSB's over on wk2jeeps.com. I believe it's going to be under one of the radio enhancement flashes.
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Old 11-29-2014, 06:50 PM
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Re: Low Battery Warning

Quote:
Originally Posted by MDBones View Post
It's possible the battery could be going bad. There's also been an issue with the RA3/RA4 radios remaining on with the ignition off and draining the battery. You may want to check the 08 Electrical TSB's over on wk2jeeps.com. I believe it's going to be under one of the radio enhancement flashes.
Which links at wk2jeep.com, There is too many links over there. Thanks.
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Old 11-29-2014, 07:30 PM
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Re: Low Battery Warning

Jeep Grand Cherokee WK2 - 2011-2016 Grand Cherokee Service Bulletins and Recalls

Section 08 - Electrical
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  #5  
Old 12-01-2014, 05:19 PM
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Re: Low Battery Warning

Charge your battery fully [battery tender, engine your choice].
Disconnect any added junk.

Then since it appears you have a voltmeter, turn the engine off and measure across the battery. It should be 12.66, or close enough to 12.7 volts. [12.5 is a 70-80% charge] although you need to drop those numbers 1/100th volt for every 10F battery temperature.

Then turn your headlights on, high beam [block the mirror sensor if necessary] for 10 minutes and measure the voltage again.

If the voltage drops a lot, it would mean your battery is going bad and is only taking a "skin" charge.

If the voltage does not drop, you could be looking at excessive drain, where it is best measured by an inductive amp probe. It can be done with an ordinary amp meter but you have to disconnect a battery lead to do so, and can pop the fuse in your meter or melt it.

Check the alternator for about 13.5 to 14.5 volts across the battery while charging.

A decent electrical shop shouldn't charge too much to do the tests for you...
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Old 12-01-2014, 06:28 PM
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Re: Low Battery Warning

Quote:
Originally Posted by lstowell View Post
Charge your battery fully [battery tender, engine your choice].
Disconnect any added junk.

Then since it appears you have a voltmeter, turn the engine off and measure across the battery. It should be 12.66, or close enough to 12.7 volts. [12.5 is a 70-80% charge] although you need to drop those numbers 1/100th volt for every 10F battery temperature.

Then turn your headlights on, high beam [block the mirror sensor if necessary] for 10 minutes and measure the voltage again.

If the voltage drops a lot, it would mean your battery is going bad and is only taking a "skin" charge.

If the voltage does not drop, you could be looking at excessive drain, where it is best measured by an inductive amp probe. It can be done with an ordinary amp meter but you have to disconnect a battery lead to do so, and can pop the fuse in your meter or melt it.

Check the alternator for about 13.5 to 14.5 volts across the battery while charging.

A decent electrical shop shouldn't charge too much to do the tests for you...
Thanks. I stopped by the Jeep Dealership today. They will look into it tomorrow and couple of recall and update to perform.
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Old 12-07-2014, 04:05 PM
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Re: Low Battery Warning

Here is an update of what happened. I went to the dealership last Tuesday. They perform a recall and check on the battery and refuse to update the Uconnect for me. Details can be fine here. http://www.jeepgarage.org/f73/bad-ex...ate-82068.html
They told everything was fine not until this morning. My car was sent to body shop to repair the bumper and they aren't able to give me back until Monday. This morning, I was awake by some warning message from my car saying my battery is voltage is low again. I guess this time it's a bad battery, what do you guys think?
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Old 12-08-2014, 04:33 PM
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Re: Low Battery Warning

Try a shop that specializes in electrical/charging systems. Your dealer appears to be worthless.

If you charge it up and run a quick load test [headlights] does it hold a charge or not?
You could have the rare bad factory battery, but you could also have something more serious such as a popped alternator, bad regulation, or unusual current drain.


Some Sears automotive stores will check charging/battery... where it tends to be faster if you are looking to buy one than get warranty replacement on a DieHard.
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  #9  
Old 12-08-2014, 04:45 PM
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Re: Low Battery Warning

Quote:
Originally Posted by lstowell View Post
Try a shop that specializes in electrical/charging systems. Your dealer appears to be worthless.

If you charge it up and run a quick load test [headlights] does it hold a charge or not?
You could have the rare bad factory battery, but you could also have something more serious such as a popped alternator, bad regulation, or unusual current drain.


Some Sears automotive stores will check charging/battery... where it tends to be faster if you are looking to buy one than get warranty replacement on a DieHard.
I would think it's a bad battery since my car was sitting in the garage for months and seems like the dealership doesn't want to replace the battery for me and none of the shops in the area would able to help me since the GC battery is unique, they don't have aftermarket parts. I wonder if anyone have some luck to find a place would replace the battery for me. I am heading to Chicago tomorrow and I wonder if there is a dealership or shop would able to help me with that.
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Old 12-09-2014, 04:25 PM
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Re: Low Battery Warning

Just got it back form the body shop and the parking sensor is not working. I sent it to Jeep dealership, now I just sit and wait to see what happen. The battery low voltage message has went off the whole morning.
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