I purchased a used JD 8220 tractor in December. It came with a 2600 screen and an ATU 200 for autosteer. I purchased a new 6000 globe to go with this setup. I hooked up everything a couple of days ago and it says "No GPS detected". I took the globe and the 2600 over to a neighbor's and tried it on one of his tractors and it seemed to work fine so I think I narrowed down my problem to a wiring issue.
So, any ideas where to start looking for the problem? Or do I just need to start replacing harnesses?