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Originally Posted by Zulu95
For the "Side/Rear light" feature the LKM puts out 3.8 V AC. The proper bulb is a double filament type. And, as withidl said, only one filament is used for both brake and side/rear lights. Complicated solution to a very simple problem.
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I think there's a method to their madness. By having the LCM control the bulb intensity by varying the voltage they can run one less wire in their circuitry to the bulb (the extra filament would require a separate circuit) thereby saving weight and assembly complexity.