XK8 / XKR ( X100 ) 1996 - 2006

03 batt voltage is 12.44 at 50 degree, ok??

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Old Mar 23, 2015 | 03:30 PM
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Default 03 batt voltage is 12.44 at 50 degree, ok??

I have seen the threads on the batt voltage. My car has been sitting all day, 8 hours, it is about 45-50 degree outside. Just had the batt voltage read, was at 12.44. Is that a good voltage? I ask because I am still having random lose of mem for the car windows to go up after you close the door. Both doors have done it a few times over the last months with the pass one doing it last week. I reset them then they are ok.
 
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Old Mar 23, 2015 | 04:01 PM
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What does it read with the headlights on? Anything below 12.0v is very suspect. A free charging system test at your friendly neighborhood auto parts store will tell the tale.
 
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Old Mar 23, 2015 | 04:32 PM
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I did not know to do that so I didn't check it that way. Can I test it after I have driven it or will that a false reading if the battery is still ok?
 
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Old Mar 23, 2015 | 06:19 PM
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Just leave the lights on for a few minutes with the engine off. Doesn't matter much about charge. Any weak battery is going to drop below 12.0v pretty quick. Any good battery should stay above 12.0v for quite a while.

A full load test at the AP store is the best way to tell.
 
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Old Mar 23, 2015 | 06:45 PM
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i would have to take the battery out and take it to a auto parts place right?
 
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Old Mar 23, 2015 | 07:24 PM
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Most would be happy to do a complete charging/battery system test on the car. They want to sell you a battery or an alternator.
 
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Old Mar 29, 2015 | 06:03 PM
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I got my battery "load" tested today at a car parts place with the battery in the car. The process only asked to turn the lights on then off. It was 45 degrees out, car was sitting for about 24 hours and just hopped in and took to car place about 5 min away.
His reading was voltage 12.34, LOWER then test I did with meter in the first post here.
Measured 692 CCA, battery is a 950 CCA. It said the battery was good but needed charged. The battery was made in 2010.
I post this today because last night I got a weird event with the lights. I had them on auto, they were on working fine as they always d0, I turned on the fog lights and they shut off, fogs lights on all. I turned them back to ON not auto and they worked fine and the fogs. One other odd thing is when it did this 1/3 of the radio display went dark. I tapped on it and it was ok again. So I fiddled with the lights and the AUTO was not working when in auto and it was dark outside. I got it to work on auto only once then just put the lights on ON and went home. Got in car today and all the functions were working normal auto no issues.
I wonder if the battery is the issues as I have had recent one off door windows not holding settings.
I ganna think I need to prob go ahead and get a battery. These batts have a vent tube right????
 

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Old Mar 29, 2015 | 06:14 PM
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Brg, Yes, on the vent hole. The plug in tube is sometimes laying behind the battery and hasn't been plugged in for like ever. A possibly 5 year old battery in this car is always suspect.
Did you ever check the little metal tag that falls down when you pull your key out, it sucks voltage if it doesn't close.


Wayne
 
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Old Mar 29, 2015 | 06:24 PM
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I don't check it no. But I seem to recall hearing a click when I pull the key out.
 
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Old Mar 30, 2015 | 11:14 AM
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that little door for the key, closes but for a tiny part till open, like a 3rd of this which I think is normal??? As I said I hear it clicking shut. I doubt that is my issue
 
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Old Mar 30, 2015 | 01:31 PM
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Sounds like a new battery is a very good place to start. Low voltage will product all sorts of illogical issues with the car's electronics.

The key slot cover may or may not be shutting down the security control module. You can verify that by measuring the current drain between the battery and one of the battery cables removed. After 20+ minutes the current should drop below 30ma.
 
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Old Mar 30, 2015 | 02:34 PM
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that key slot cover closes almost all the way but for a tiny opening which I would think allows the key push it in or down (whatever way it goes). Should it be closed ALL THE WAY?
 
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Old Mar 30, 2015 | 02:35 PM
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I took the key out several times in a row and it always closed at the same place.
 
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