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; ORA II; Advanced Technology Group. Built April 2013. At 41,000 miles transmission valve body assembly under warranty. At 43,000 miles (70 000 km) transmission replaced under warranty. Now has 53,000 miles (84 000 km).