I have a 2018 JLUR. During the summer we go to an old fashioned outdoor Drive-In movie theatre where they broadcast the sound using the radio in the vehicle. So we need to have the radio operating ... by using the ACC mode on the ignition. Problem is I cannot get the dash lights to be off ... the dimmers don't have a off position (that I could find). Anyone know how I can have the Jeep off, radio on, all lights off?