Well, the good news is, I got my hands on a parts only 2160 so I could snag the box out of it, and turns out that was part of the issue. When I went to plug in the new box I found that I couldn't get the plug to go in, then I noticed the old box had 3 flat male pins on it, and the new box had 4. Turns out one of the pins had made it's way into the connector. I cut and put the new connector on, and now I have a light that comes on, then flashes two times so I have an error of some sort, but at least I'm making progress. I'll double check all my wire connections before I go too crazy looking for what might be wrong, but at least I have a light to troubleshoot now.