Where is the cigarette lighter fuse on a Citroen C4? Where is the cigarette lighter fuse on a Citroen C4? The Citroen C4 Picasso vehicle, also known as the Grand C4 Picasso, comes in either 5 seat or 7 seat models. This vehicle is smaller on the Fuse Box Diagram > Citroën C4 (2004-2010) Cigar lighter / power outlet fuses in the Citroen C4 are the fuses F8 (Front 12V socket) and F9 (Cigar lighter / Rear 12V socket) in the Instrument panel fuse box. Fuse box location There are two fuseboxes under the dashboard, one fusebox in the engine compartment and another on the battery.