Hidden at the bottom or sides of the unit, these supply high-current systems like the radiator fan, ABS block, and cabin climate blowers.
The tier level (B2, B3, B4, B5) dictates factory-installed internal relays. A BSM B3 unit features integrated relays for front fog lights (which B2 units often lack) but excludes specific auxiliary relays found in B4 and B5 tiers (such as secondary air injection pumps). siemens bsm b3 schematic
The refers to the internal layout and pinout mapping of the Boîtier de Servitude Moteur (BSM) , a vital engine fuse and relay box co-developed by Siemens and utilized extensively in Peugeot and Citroën vehicles . Understanding the Siemens BSM B3 Hidden at the bottom or sides of the
The BSM B3 utilizes a master circuit board feeding several multi-pin connectors labeled by color and alphabetical position. Large Power Interconnects The refers to the internal layout and pinout