I fixed the fuel gauge on my 1987 Ranger 2.9L. The gauge has never worked since I purchased the truck and I confirmed that the fuse was not the problem. More than likely the Sending Unit was the culprit, but since my truck is 20 years old, I decided to overhaul the fuel system by replacing the following parts:
* Fuel Sending Unit
* Lower Pressure Fuel Pump
* High Pressure Fuel Pump
See the pictures below for the entire process. The total cost in parts for this project was around: $260.00
Filled up the tank and the gas gauge is working fine now.
Unbolt the two straps from the tank.
Fuel tank cavity
Clean tank with water hose while taking caution not to add water into tank.
Remove sending unit and low pressure fuel pump.
Assemble the new fuel sending unit and low pressure pump.
Install sending unit into tank and mount tank back onto truck.
Remove high pressure fuel pump (attached to frame)
Remove fuel pump from metal housing.
Install new fuel pump and mount back onto frame.