Peugeot 301 cruise control failure

I had a similar issue on my 301. Check the brake light switch and the cable that connects the steering wheel, especially the clock spring. Do your brake lights work? It could be a blown fuse related to the brake lights, which often ties into the cruise control system as a safety measure.

Clock spring, you mean behind the steering wheel? The brake lights are working fine. Where's the brake light switch located?

Yes, the clock spring is behind the steering wheel. The brake light switch is usually near the brake pedal. But if your brake lights work, the problem is probably not there. Looks like it may be the cable or plug connection of the cruise control and going to the workshop may be the best option.

Went to the workshop. You were right: defective cable or plug connection. Repair cost me 95€.