Your hazard/turn/cruise module in the steering column has failed. The third light still works because the third brake light switch is mechanical tied to the pedal.
I had the same problem with my 87 Riv. It was a burnt out bulb in the rear of the car. My front signals did work and as they run on different circuits, check and replace the bulbs. Access to the back lights are inside the trunk back.
Jamco Suspensions has them
Sounds like it's not your bulb that is bad. It may be your brake switch isn't working.
The only thing common to all those lights (but not to the center brake light) is the hazard switch. I'd check that next. On my 96 Century the hazards override the signals and brake lights meaning that the signals and brake lights must be wired into the hazard switch somehow.
outer most lights.
I would replace the line....ughh
I have a chev cavlier 1995 and the running lights do no work---on the dash the green light keeps blinking----what should I do?
I have 05 with no brake lights
Buick Riviera was created in 1963.
buick riviera '92. My dad had one and he loved it.
possibly a bad headlight switch, or dimmer switch. Some later model buicks have a lighting module under the dash about in the middle. I think yours is too old to have that though.
If the brake light fuse is good then it can be the brake light switch. Some are mechanical switches and some are pressure switches. If it is a pressure switch, the switch will be on or near the master cylinder, and you will see a wire going to that switch. If it is mechanical, the switch will be located somewhere on the brake pedal swing arm. it may just need adjustment or it may be bad and need replacing.