Filament monitor

In the event of a break in the front fog light circuits, UEC (342) sends the bus message "Right front fog light not working ON" or "Left front fog light not working ON".

Fig 1: Identifying Filament Monitor

Courtesy of SAAB-SCANIA OF AMERICA, INC.

NOTE: If one or more of the conditions are not met and the fog lights do not come on when the switch is depressed, the switch must be pressed again to light the fog lights once all conditions have been met.

IMPORTANT: When changing a bulb, use one with the right output otherwise the components could be damaged.