1)Take out the mirror by pushing on the tilting mirror upwards, pushing on the top of the mirror and pulling on the bottom of the mirror.
Here's what it side mirror housing looks like without the mirror. The red boxes show where the plastic backing snaps onto the mirror housing.
2) To separate the mirror from the plastic housing, follow this youtube video: https://www.youtube.com/watch?v=KM2u...eature=related.
Just like in the video, you only need to heat the plastic edge. I think he went around the edges for about 30 seconds with the heat gun. Be careful you don't do it too long at one spot otherwise the heat will melt the plastic.
Success! The back of the driver side mirror had sticky double sided tape on the spot where he wanted the arrow so he had to clean and remove the sticky tape and also part of the brown tape in the middle of the mirror (red box):
Be careful when you do this. If you scratch the back mirror surface, it will show up in the front. I have a few scratch marks on the front but you can't tell unless you are looking for them.
3) Dremel out a small spot on the plastic in order for the led to fit:
4) Here's what the arrow looks like fitted to the back of the housing:
Now put everything back like it was and connect the wires to either the fender indicators or the side mirror indicator(in some cars).
ENJOY !