Flickering brake light, possible parasitic draw?

It's some kind of parasitic draw. Only the driver's side light flickers. I tested both headlights by plugging them both in on the passenger side and had no issues so it's not the actual light. I pulled the fuses and checked those. No issues. When I connect the battery, any light plugged into the driver's side does this. I pulled the seats out and checked the wiring connection and there were no breaks on the wire. It looks perfectly fine. Any ideas?