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Old 12-11-2010, 11:03 PM   #1
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Whirring noise

When I open the door on my 2007 JK, there is a brief whirring noise. I also hear one when I turn off my jeep. Sounds like it is coming from under the dash somewhere. Anyone else hear that in their jeep?

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Old 12-11-2010, 11:35 PM   #2
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Yeah, I hear all kinds of electronic gizmos making noises even when my Jeep is "off". “It’s a Jeep thing”

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Old 12-12-2010, 12:23 AM   #3
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Probably just the air ventilation ducts opening or closing, not sure but I hear it regularly.
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Old 12-12-2010, 07:04 AM   #4
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Believe it or not, I'm guessing it is coming from your radio. Mine makes noises like that. For what purpose? IDK But when you have a radio that has a computer and thus a mind of it's own, it wants to breath too.
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Old 12-12-2010, 07:08 AM   #5
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I was wondering about that myself. Wonder what happens when you take the doors off?
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Old 12-12-2010, 07:22 AM   #6
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Quote:
Originally Posted by joe002 View Post
Yeah, I hear all kinds of electronic gizmos making noises even when my Jeep is "off". “It’s a Jeep thing”
Thought it was just my Jeep. Only bought it recently and just had the battery replaced because the PO thought it was bad (wouldn't hold a charge). I'm near it the other day and I kept hearing a quick, short "buzz" sound coming from it every couple of minutes. Haven't been able to isolate it, but I'm wondering if that is what was draining the old battery. I've since gone to disconnecting the leads until I have the patience to take the time to get ever closer at each buzz, to see if I can't target where it is coming from.

It's going to be a contest of wills. Buzz is so short it's hard to get a read on where it's originating.
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Old 12-12-2010, 07:34 AM   #7
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Well if it sounds like it is coming from the radio, ignore it. The most important thing to check in the situation of too much drain on the battery is the current being drained. You can do that with a standard digital multimeter set up to measure current. Be sure to use the high current shunt (separate) hole that the red lead plugs into for the 10A scale. You shouldn't be drawing more than that with the jeep sitting three off with no dome lights or any other light on. The owner's manual should have the typical current drain while the jeep is off somewhere in there under specifications. If not, try googling it to see if you can come up with some base line. One way to determine how much draw is acceptable would be to calculate the number of amp hours used over, say: 5 days. Compare that to the number of amp hours that the battery is rated at. If you use more than ten percent of the total amp hours in 5 days, that may be excessive. The jeep should be able to sit for 5 days and still be able to start. I would think with 90% of the charge still left, it will still start.

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