One problem related to defogger has been reported for the 2001 Jeep Wagoneer. The most recently reported issues are listed below.
The heat on the driver side went out at apoximately 70k miles. . . Luckily it was at the end of the winter. . Now this winter the heat was only coming out of the passenger side for about 2 weeks. Now I have no heat and it's 20 degrees. A hat, gloves, and warm coat is not cutting it. The dealer ship wants over $1000 to fix it, so nothing has been done yet. Merry christmas. . .