Im trying to install a kenwood ddx470 stereo and my navigator comes with a soundmark system with oem navigation not thx but so far the wiring harnesses that i have bought only turn the stereo on but no sound comes thru the speakers, also, i have 3 nore connections that are not being hooked up and they seem to run down to an amp and the navigation player, metraonline.com sold me the 70-1776 wiring harness and nothing fits anymore, if anybody knows what im doing wrong please let me know, i have had this navigator in pieces for 3 days and i need to get it done, thanx guys