My navigation system, compass and Sirius XM service haven't worked since I bought the vehicle the day before Thanksgiving. I took my Jeep to the service department and they installed an antenna - but, that did not fix the problem. They now know that they need the wiring harness (that runs from the external antenna to the internal antenna). Unfortunately, they have been searching for the part for TWO WEEKS and cannot seem to find it. Has anyone else had this problem?