I just recently bought a 2004 Honda Odyssey and it came with a aftermarket dvd player in it. It is an Audiovox system. The system has a screen mounted on the ceiling of the vehicle with controls also to listen to the radio station in the back. The dvd player itself is mounted on the floor with a AC adapter to plug in a playstation or something. The dvd player is a "moviestogo" dvd player. I know that I probably can tune-in to a radio station to feed the sound through the car speakers…does anyone have an idea of how to do this?
I figured it out! There was a non-descript switch in the dash. When you flip it on it switches to audio input to the dvd player rather than the tuner. I tuned into 88.7 and viola! It works now! thanks to everyone who sent answers.