The tail or brake lights may be dim due to a poor ground connection inside the light socket. Failed light sockets will require replacement.
Car Problem Reports
Pontiac Firebird Dim Tail or Brake Lights Due to Faulty Light Sockets
Pontiac Firebird Problem
Average Mileage: 92,500 mi (55,000 mi - 130,000 mi)
Visitor, 1993 Pontiac Firebird, 55,000 mi
Brakes lights on on then when I brake they go off. Right side is intermittent.