head rest sound 2005 silverado

I have recently installed a in dash dvd and head rest unit onto my truck.  I have picture going to the head rest but I can't seem to figure out how to get the sound going.  I got the unit from e-bay from a company in Hong Kong.  It was a pretty good deal except that the directions are in Chinese.

this is the link that has pictures of the unit and all of the parts and pieces included.  Any help would be appreciated.

http:///.com/E270-2x-8-Tan-TFT-LCD-Car-Headrest-Monitor-DVD-Player_W0QQitemZ5871239477QQcategoryZ48608QQtcZphotoQQcmdZViewItem

thanks Mark

does the dvd have speaker wires on the back? is the dvd the only unit you have in dash?

there are no speaker wires in the back of dvd.  Besides the dvd player, I have the factory radio in the dash.

on the end of one of the wires coming from the head rest, there is a 12v connection, I think this has something to do with the sound, but everytime I connect power to it, it blows a fuse.

does the headrests have speakers in it.

you could run an FM modulator through the ant to pick up the DVD sound and play it through the cars speakers or wireless headphones.

do the tvs work without that 12v wire hooked up?

fm mod needs a ground and a key switch that can be found behind the radio. you can actually get a wireless one that doesnt need to run to the ant but they are known to have motor noise.

do the tvs have any kind of RCAs inputs?

do they heve any kind of audio input wires?