passenger mirror
 

my passenger mirror heat and auto dim doesn't work. I bought a used one that the owner said it all worked. The heat and auto dim doesn't work on it also. Has anyone had this before. I am thinking it maybe the power window switch is the problem.

Use a Multi Meter
Do a continuity test to the mirror to see if the mirror is faulty.
With the multimeter check to see if you are getting power up to the plug on the door