Confirming if Heated Mirror is Out

[jsoto]

Anyone know a easy way to confirm if the heated portion of my DS mirror is out. And OR a combo of that and the self dimming option.

My Passenger side has a slight yellow HUE to it and I know it works.

Last year, if memory recalls, as the end of winter, I noticed my DS was not defogging like my passenger side. As well, and I've paid more keen attention, but it's situation dependant, but I think the self dimming on the DS is out too.

The only telltale clue I can tell you is the PS has a slight yellow hue to the mirror and my DS does not.