Ok. Latest update. I hooked up both power wires out of the mirror to the switched 12v and it only works with key now. Also, hooked up old mirror and it does not dim the side mirror. Working great now.
Last update…not hooking up the 12v always on wire will result in the mirror going back to default settings. Homelink info is still stored but if you wanted to have the compass off, or the dimming feature off, you would have to manually turn it off every time you start the truck as the default setting is on.