So, when a battery quits, it really does not fool around.
So dead that the interior lights would not turn on.
So dead that the ignition key was not recognized.
So dead that I could not open the trunk.
I had to hook up a battery charger so that I could get into my trunk to transfer stuff to my trusty 21 year old back up car!
How does a battery go from functional to zippy that fast?
You probably lost a seat controller and it is draining the battery....
common problem im sure ur aware of....
Had one fail (on another car) while it was shut off for refueling. DEAD.
The friendly attendant emerged from his bulletproof cubicle and admonished me to “move your car!”
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what a bad seat control module usually does is keep the command system fan on 24 hours.
Normally, once you shut off the car and pull out the key, the fan behind the navigation stays on for about 3-5 minutes(I think) and then shuts off automatically. When your seat control module is bad, it stays on all the time, thus draining your battery. Stay in the car, and turn it off and you can hear it running.
Trouble shooting:
Maybe try disconnecting one side(I think I have read that the passenger side goes bad most often) and then take out the key. Listen closely for the fan behind the Command screen. Wait 5 or so minutes and it should shut down. If it does, try disconnecting the other side.
Side note: Depending on how long you have this problem, it may also put extra strain on your alternator thus causing it to fail prematurely as well. Best to take care of it ASAP.
Good luck!!






