Re: No radio signal
To reset UConnect, press and hold at the same time for six or more seconds the round volume knob and the round browse-enter knob. Doing so is an alternative to turning off and then restarting the engine. Your UConnect is RA4.
2014 Jeep Grand Cherokee Overland 3.6L 4x4; Quadra-Lift II; Off-Road Adventure II; Advanced Technology Group; Vesuvio Indigo Blue interior; white exterior; engine block heater; CD Player. Built April 2013. As of January 4, 2015, the Jeep has been driven about 37,000 miles (60 000 km).