Do they actually flash or do they just dim a bit?
Mine seemed to do that and then I realised that it has headlight washers and it was spraying water on them.
As above.
The headlight washer spray makes it look like the lights are dimming for a second.
If you want real wonky wiring, you'll be needing a Renault
My old Espace went through a phase of killing the ignition circuit when the wipers were on, as well as many other little faults. :bang: