BMW Repair: 1992 BMW 325I instrument panel, 1992 bmw 325i, bmw 325i

Question
The fuel, odometer, & speedometer, etc. is not working on the instrument panel.  what is working is all the warning lights.  We have checked all ground wires - they are ok.  Could you possibly tell me what might be wrong and the best solution to fix.

Answer
each system requires different ways to check thier operation on how they work.Your first move would to get an ETM or wiring diagram for their circuits and follow their paths. If the grounds are ok then the inputs need to be looked upon,the wires do get old in the harnesses brittle and break allowing for the wires to corrode.An ohm meter will tell you if there is high resistance in the circuit.