The Ohm Guage just stopped working but all other guages on dash work
ohm guage on 1993 Mercury Cougar
Do you mean the Oil gauge? I worked at Ford/Mercury dealerships and don't remember seeing an Ohm gauge. If it is the oil gauge, check the oil sending unit? Is your engine as quiet as normal or is it knocking and rattling which would indicate loss of oil pressure. If it runs and sounds normal, the most common problem is the oil gauge sending unit.