The first step to troubleshooting any electrical issue in your 2011-2016 WK2 Jeep Grand Cherokee such as a malfunctioning radio, window wipers, power windows, sun roof, tail lights, etc, should be to check for a blown fuse or relay in the electrical box located in the engine bay. Check out my DIY tutorial for the procedure by clicking on the text link or thumbnail image below.
Jeep Grand Cherokee Electrical Fuse Replacement Guide
