I just got this car about 2 months ago. It has a problem but it isnt all the time.
When it acts up The boost screen goes out, the rear defrost dont work, the heat only works on #5 setting, if you have the auto lights it will kick off the headlights if your on any setting but #5 or off. The boost screen sometimes will light up really dim if the heat is on #5 or off. When it doesnt act up it will work fine. All the heat settings, the lights, the screen everything.

Anyone run into this problem before I start printing out a bunch of wiring diagrams and fishing one wire at a time.