Subaru 2006 Baja - Manual (Page 151)

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Instruments and controls
that will run down the battery. Front fog light button
Front fog light button
The front fog lights operate only when the headlights
are on low beam. Push the front fog light button to turn
the front fog lights on.
Press the button again to turn them off.
The indicator light located on the button will illuminate
when the front fog lights are on.
UB3030BA