Peter, have almost the opposite problem! My stereo in my 2020 Conquest for some reason no longer plays through speakers in cab, but through speakers on the outside. I wish I had an answer for your situation, maybe you have one for mine. Happy and safe travels to you!We just had our first trip on our 2021 BT5245. Of course with every new rig there are things to figure out. I am wondering how I get the outside speakers to work with the radio audio system..... FM radio or streaming from my smartphone.