A small update, and thanks.
Wow, it's been a bit. Life has been a bit busy, plus I'm back in classes going for an Assosiate's in EET. A few family issues, but those are something I keep to myself. Regardless, 200 followers! Really appreciate it. Concerning the truck, I did find a tip to help with the nav system. I was given certain resistance specs to keep in line with each wire, and both stayed under the 5 ohm resistance. At this point, I will take a gamble on a new disc reader, as I am led to believe that the unit is not sending A/V signals to the screen unit. If that fails, then I am going to have to pray I find a harness.
I also did another mod recently that I planned to post, but the site would not let me upload the pics, and it wouldn't let me post that one without them. If and when I get this nav unit working, I'll post up a pic and video of the system running. It's been something I've wanted working, but life has been getting in the way.