Write up on temp. reading rear view mirror

Been trying to find the write up on a suburban rear view mirror that has temp. and compass read outs. Gave step by step on how to wire and mount.. Pretty sure it was on this forum but it might have been on pirate4X4.

Thanks

This was linked in another thread fairly recently.

http://www.jeepforum.com/forum/f9/compass-temp-auto-dim-mirror-swap-detailed-lots-o-pics-952705/