Almost a year late answering this, but I mapped all of the dimmer sliders to a single axis with the following variables last night. All are scaled from 0 to 100.
TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_LEFT_INST_1” TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_ENGINE_INST_1” TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_LOWER_INST_1” TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_RADIO_1” Value=“0”>
TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_COMPASS_1” Value=“0”>
TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_RFLT_INST_1” TargetDataDefinition=“B:PASSENGER_LIGHTSWITCH_SIDE_CONSOLE_1”