hi y'all. just wondering if anybody can help me on how to change my side mirror turn signal lights. they're located on the bottom of the side mirrors. thanks

 

Here's the parts page for a 04 xc90 mirror - there is only one bulb in it - and it points down - #11 in the diagram. That bulb is your "puddle"light - to illuminate the ground next to the door. The only way to turn them on is with your remote - push the yellow button on the remote to activate them. To answer your question the lens pries out from the bottom of the mirror housing.

 

Thank you very much for your help