The BOO (Brake On/Off) Switch may need to be replaced. If it is bad, it would cause the brake lights to NOT illuminate when the brake pedal is applied.
Check your brake light switch at hte brake pedal.
A bad ground wire is the most common cause of turn signals and brake lights not working. The ground wire connection might be corroded.
Blown fuse, bulb, or bad brake light switch.
Check the bulbs, fuse & brake light switch on the pedal.
It is your multifunction switch that has gone out. It is located in the steering column. I used my emergency lights and it blew out brake lights, turn signals, and emergency lights. In newer models Chevy did a recall not so for our older models. Mine is a 1995.
Check the switch on the brake pedal
The probable cause of the brake lights not working on your Renault is the brake light switch. The brake light switch can be found under the dashboard by the foot pedal.
burned out bulb, blown fuse, wiring
Blown fuse, both lights are burnt out, There is a wiring or ground issue.
If the turn signal is working it's either the brake light switch or the turn signal switch.