Well, this answer didn't really fix my problem. I was able to ground the parking brake wire and i could tell it had an effect on the unit because I was able to play a DVD in it. However, I still could not access the bluetooth settings as they remained greyed out.
What I'm trying to do is erase whatever's stored in there so I can pair it with our phones. We installed it brand new and when we were playing with it, we paired it with 3 other devices (not the ones we want). Now I can't clear them out to pair the valid ones.
I'm looking for some way to completely erase/factory default th
