I did a search and came up empty handed.

The lights on my enviromental control do not work. I am guessing this is a replacement item and not a repairable item but thought I would ask. Has anyone repaired one of these? Thanks

Here's a thread from the DIY section with a bunch of info. Hope this helps and good luck.
http://www.dieselplace.com/forum/showthread.php?t=278017

Sweet! Looks like all of the info I need is there. Thanks!