Siemens Bsm B3 Schematic Verified -

He replaced the blown components with modern equivalents scavenged from a parts bin labeled "Legacy Misc." The new parts were smaller, more efficient, but they fit the legacy footprint.

: If the fuel pump isn't running, it is often a burnt internal relay within the BSM B3 rather than the pump itself. This can be verified by checking for 12V output at the specific connector pin for the pump. siemens bsm b3 schematic verified