Buick Regal Brake Light Wiring

When I Step On The Barke Pedal Only The Rear Window Brake Light Illuminates. I Have Checked The Fuse And Replaced The Bulbs But The Rear...

My Brake Lights Work Only When They Want To (when Brakes Being Pressed) Not Working At All When I Dont Have The Main Headlights On....

I Have What Appears To Be An Open Brake Light Wire. New Brake Light Switch Is Good. Voltage Present As It Should Be. Fuse Good. I Have...