I own a 1989 525I and I have some problems with my dash. All of my dash lights don’t work, the LCD bar on the bottom of the dash doesn’t light up but in the right light I can see that it is working and changing numbers. Also the speedo fluctuates randomly while I’m driving. All of my other electronics work fine and I have tried the fuses under the hood and they are all good and I switched out the dash with my parts car and the problem is still there, what can be causing this problem???