Okay I have a 1985 Cadillac Fleetwood. All of the gages are digital. The gas gage isn't showing any numbers on either side it just jumbles a bunch of little green lines. Also my heater and ac don't work plus the gage for that to show me how hot the air is or how cool the air is isn't working. Can anybody please tell me what my dad and I should do to fix this problem?