I have a small bundle of wire hanging down from under the dash for a while now and curiosity finally got the best of me. LOL I finally crawled under to see what it went to. Apparently my Jeep and one of those ignition security systems. I have the same thing in my PT Cruiser and so I recognized the piece you wave the fob in front of. Weird thing is, I have never had the fob and my Jeep starts just fine. Not sure how they disabled it? Only wires I can see are the ones going to the fob receiver thing.
In this pic you can just see the piece that you wave the fob in front of. It's tucked under the air ducts.
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This is a pic of the box.
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