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you have a switch on the brake pedal that activates the lights its hard to see as most are mounted high up the pedal shaft. Check to see if its loose or the connector has become unplugged.
fuse, bulbs
Check the bulbs, fuse & brake light switch on the pedal.
Wiring or bad bulbs
It can be connection wires, bulbs or fuses.
Probably the wrong bulbs or the brake lights are getting stuck "on". Or maybe a combination of the two. Check that you have the right bulbs and check to make sure something isn't keeping the brake lights on. FriPilot
normal wear and tear. Brake light switch, bulbs or sockets.
Check the bulbs, then the fuse, then the switch at the pedal.
Bad switch.
Check the bulbs - they are doubloe filamented with the smaller being for brake/turn signals Check the fuses
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.
You need to check the wiring for power to the bulbs.