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4.2.3 Electrical connections to the Bosch drive unit
The Bosch drive unit has five positions to connect electric parts. Two of the connections are available for directly
powered lighting (12 Volt, at a maximum current of 1500 mA in total, randomly distributed for both front and rear
light). On 25 km/h of 28 mph bicycles, the lights can be switched On and Off on the display. On 45 km/h Speed
Pedelecs, the lights are is always on; the front light can be in day light running or low beam modus, depending on
the surrounding light intensity (light sensor driven).
Electrical connections at the drive unit
*Note.
When the drive unit must be replaced, the replacement drive unit must be of Bosch model year 2017 or newer as older units
cannot deliver 12 Volt.
The default voltage on the replacement drive unit is 6 Volt. With help of the Bosch diagnose software, the voltage to power
the lights must be switched to 12 Volt (the maximum current, in total, is 1500 mA).
Electrical diagram of the Bosch eBike system (with all options)
*Presence of some options is depending on the bicycles’ configuration and region
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