This is why owners of these cars are advised to add a secondary fuse box (for lights, wipers, radio) as a first modification.
The electrical layout of the Renault 551 is centered around a traditional 12-volt battery system that powers the engine starting, lighting, and auxiliary sensors. Schema Electrique Renault 551
Below is a textual representation of the standard wiring diagram for the Renault 551. Note: For visual schematics, consult the factory manual "Renault 551-71-81" edition. This is why owners of these cars are