Siemens Bsm B3 Schematic Verified ✧ 〈DELUXE〉

: The board includes several relays, including those for fog lights (which are present in B3 and B4 models but often missing in the B2 variant).

A verified IGBT structure shows a diode drop (~0.5V to 0.8V) from gate to emitter (positive probe on gate, negative on emitter). It should show open circuit or high resistance in reverse. siemens bsm b3 schematic verified

Troubleshooting and Replacing the Siemens BSM B3: A Complete Guide : The board includes several relays, including those

for a particular function, such as the fuel pump or headlights? : The board includes several relays

View from the top (label facing you, terminals pointing down).