I have started some diag work on several electrical issues pertaining to the notorious digital dash in these cars. I have sucky wiper controls no ac controls at all & my wipers get stuck on the left turn signal. I was able to remove the A/C & wiper controls with no issues. I notices once the board was apart that one on the transistors on the board is cracked. The back has the markings 8399 BQ EBC1 & can't seem to find a replacement for this. I also know that the contacts themselves on the switches are heavily worn & was wondering if anyone had solutions & or ideas how to make better contacts.