Altima GXE L4-2.4L (KA24DE) (1999)
With the room lamp switch ON, ground is supplied to turn room lamp ON.
When a door switch is opened with the room lamp switch in DOOR position, ground is supplied:
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to room lamp switch terminal (D)
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through front door switch LH terminal (1), rear door switch LH or RH terminal (1). With power and ground supplied, the room lamp turns ON.