electrical problem NEED HELP DESPERATELY

I have a serious problem with my interior lights. All my dimmable interior lights (that would include my gauge lights, climate control lights, clock, and my shifter lights)have gone bad. None of the lights previously stated would come on at all with the expection of the clock, and even that, the clock will go go crazy between bright and dim and will then evenutally fade out once i turn on the guage lights. So i now can only drive in the day cuz i can't see my gauges at night. So can someone, ANYONE please help me with this problem. ANY help would be appreciated. Oh yeah one more thing, i check the fuses and all the connections to the lights and everything seems fine, fuses are fine and there are power going to the lights. However, the problem seems like them lights aren't being grounded. So does anyone know what might cause this and how i can fix it without bringing it to a shop and have them ripe me up a new A$$hole. Oh yeah thanks for spending the time to help me out.

Oh yeah if it helps
i own a 1990 gxe