My Reatta is throwing a code for the bcm(body control module), which I believe, because vanity lights and dome light don’t work. However, when the battery is disconnected and then reconnected, or you remove the bcm fuse and put it back in, the bcm functions properly. But, when you turn the key on then off, it doesn’t work until you do one of those two things again. Is this another issue or is it just my bcm? Posted this in the Facebook group but it got zero responses so I’m counting on this. I also believe that my car does throw the b556 code.🙂