Hey Rickster, looked for more info in the repair manual last night. Didn't really find anything all that useful, except you'll be glad to know that the wiring diagram looks fairly simple for the rear window defogger. One thing that did sort of stand out for me is in the wiring diagram it shows some sort of defrost controller, which is located in the back somewhere (near the rear window?) ... I couldn't find any more info on this controller, but it may be something to look into.