HAVE YOU CHECKED THE FUSES?
Someone may have switched the sockets in the back of the lenses.
Where is the fuses for the brakes lights Buick Rivera 1970
no
You need to have the abs checked for codes. Then you can diagnose cause.
TRy changing your brakes and closing your doors while driving.
Check the switch at the brake pedal .
When you press the brakes, the lights brighten up mainly to alert drivers behind you that you are slowing down or stopping. It prevents accidents
You do not have the trailer lights connected properly.
It appears to be equipped for trailer brakes.
drum brakes
Conventional drum brakes.
Check for a bad ground