All you need to do is put your Jeep in Neutral (Not required but I do it just in case gears grind or something, witch I have had happen) And shift the 4WD selector in the 2WD position, if it doesn't seem to budge, just give it a little umph (Be in neutral though), some of the older jeeps 4WD selectors just get a little stiff.
The 2002 Jeep Wrangler has four wheel drive.
The 2003 Jeep Wrangler has four wheel drive.
The 2010 Jeep Wrangler has four wheel drive.
The 2004 Jeep Wrangler has four wheel drive.
The 2012 Jeep Wrangler has four wheel drive.
The 2009 Jeep Wrangler has four wheel drive.
The 2011 Jeep Wrangler has four wheel drive.
The 2001 Jeep Wrangler has four wheel drive.
The 2008 Jeep Wrangler has four wheel drive.
The 2006 Jeep Wrangler has four wheel drive.
The 2013 Jeep Wrangler has four wheel drive.
The 2007 Jeep Wrangler has four wheel drive.