Help

Got my car (69 cuda) painted a few weeks ago, working on putting the grille, trim etc back on the car. I had the car running before paint with the headlights in it. The green turn signal indicator light would flash every once in a while, but I just assumed it was because not everything was hooked up yet. I finally got the tail lights, parking lights, etc in it today. With the key off and no key in it, the parking lights blink. I have no brake lights. My turn signal lights do not work either. My head lights work fine, high and low beam. Any idea what could cause this issue? I had to disconnect the battery for the lights to stop blinking.