Citroen C3 Fusebox? | Mend Citroen Cars | how to mend it howtomendit›Categories›Mend Vehicles, CarsC3 has 2 fuse boxes, one next to the battery box another one inside yr glove compartment. Replacing a fuse is easy but to remove the fuse box cover under the bonnet is the hardest part, French idea. ! Try fuse 14 (check with yr manual) for yr windscreen washer pump b4 buying.. Citroen C3 Water Damage in Engine Fuse Box kzngmy wrote:I will need to replace the engine fuse box as water has somehow entered one of the connectors and corroded the contacts on the fuse board. I will probably have to replace the main harness as the pins from the fuse board are corroded in the connector sockets.