Pass. mirror stopped moving

[cecil-1]

I have my passenger side mirror set to tilt down when you shift to reverse and about a week ago i noticed it doesn't do this anymore. I tried to adjust it with the mirror switch and that doesn't move it either but still operates the drivers side just fine. Does anyone know an easy way to test the mirror? Can this be the BCM acting up? The pass. side seat heater, window, and door locks still work ok.