Looking at my Chilton repair manual engine wiring schematics ( with a magnifying glass ) for the 1992 Ford Ranger it looks like fuse # 16 is a 15 amp fuse for the fuel gauge
Could be a bad controller or multiple blown fuses. Check the fuses first. I had a 95 Ford Ranger that had a bad controller and the wipers, interior lights, fuel gage, and temperature gauge would all act up randomly.
it might be a fuse
there is a short somewhere in dash or heater, you need to fix that to stop fuses blowing
You temperature gauge could be not responding because of a faulty fuse. If you check your fuses and they work then you may have an electrical problem.
It could be the fuse, but mine is because the floater that measures for the gauge is stuck.
The Ranger fuel gauge could have several problems causing it not to work. These problems include, blown fuse, bad wiring, loose connections, or a bad fuel sending unit in the fuel tank.
The Sears Ranger 105-20 16 gauge shotgun came out in the 1930s. The Sears Ranger shotgun has a 26-inch barrel.
Bad oil pressure sending unit?
AWG # 10
The fuel gauge could be getting improper signals from the fuel sensor. The sensor is located inside of the fuel tank.
According to my Chilton repair manual , fuse # 16 is a 15 amp fuse for the fuel gauge on a 1994 Ford Ranger
One scenario could be that the sending unit for the gauge on the engine is bad. Try to locate it and replace it if it is corroded and check the wiring to it also.