Why would the radio switch from CD to the radio automatically in a 1998 ford explorer sport?
You have TRAFFIC ON in the RDS portion of the radio. This will switch to the radio whenever there is a traffic report sensed on the radio station that you have tuned. It will switch you away from the CD or cassette to the radio so that you can catch the traffic report. Just hit your RDS button until you see TRAFFIC ON, then hit SELECT button to make it TRAFFIC OFF.