85 TurboCoupe Gas Gauge Doesn't work at all.

I've had my car for just a little over a year now. When I bought it, we soon discovered that the gas gauge did not work, so I just try to fill up about every 200 miles to be on the safe side. Does anyone know how to fix this, or why it might be? Any help would be greatly appreciated. Thanks.

Simplist thing is check the fuse.... allto of times there mroe than one thing on the fuse but it could be somethig you wouldn't notice. It could be the sending unit... I think its on the fuel pump but I'm not 100% I don't remember too much about when I put the fuel pump in my car.