July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Rear Window Defogger and Mirror Heater: Notes
WARNING: This page is about a different car, the 2008 Lexus LX 570. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Rear Window Defogger And Mirror Heater - Circuit Diagram (1 Of 2)