68 plymouth fury 3 brake lights on passenger side only.

I recently got a 68 Plymouth fury 3 and the tail lights will trun on when I turn the lights on and the turn signals work on both side. But, the brake lights only work on the passenger side and not the driverside. I've changed out the fuses and cleaned the connectors. Could it be a bad connection in the fuse box? Or a bad connection somewhere else? Any ideas what it could be?
Author: Jeffthro87