Hello, I had a similar fault in a Peugeot 308.
The entire right rear pilot did not turn on any light and the fastest sound of the intermittent is also heard.
Look for information in the Autodata.
And in the program he explained that he deviated the wiring connections with the pilot.
I cleaned it with a little elective product cleaner, let it dry to avoid short circuits and it works correctly.
All the best.