I have a 2004 tl and I did a navi conversion. I have a DVD rom in the trunk out of a 2007-2008, I got a 2006 navi screen and I used my radio that came with the car. I have a problem with lagging in the screen and when I use the touch screen it's like it's not calibrated and it clicks right next to where I'm wanting to click on. ( I usually have to use the joystick) when I got the harness talking to guy that does the custom harness and sells the navi conversion kit on ebay and he said I needed a adapter so that wouldn't happen. I was just wondering why and if anyone else had that problem?

 

Anyone?