Don't know why it would be doing that. I'm getting ready to put my FMIC in. When I do I may just do what one of the guys on YouTube did. He pulled the AGS motor out of the shutter assembly, plugged it into the harness, then zip tied it to the frame.
So I figured out what the problem was. There is a harness located right above the ags harness. It got loosened a little bit when I unplugged the ags. I plugged it in good and tight reset my codes and the light has stayed off. So that's definitely good