Was getting the (new to me) Sahara ready to go in the spring and the radio didn't work. I went to Walmart and bought a new radio (one with USB input so I could play all my tunes) and wired it up, still didn't work. Traced the wiring back and could not get any power back to the fuse block, so I suspected a broken wire somewhere. I rewired the hot side of the radio and everything worked fine.
Six or seven months later on the winter trip, I was sitting in the driver's seat just looking things over and I see this red switch on the dash. DOH!