Hi Mark, there are better troubleshooters on this forum, but the fuel level sensor must have a return voltage also? Perhaps 1/2 to represent a half tank of gas? 6.2 volts for example? You could check for that.
The main control may not enable voltage to the fuel pump, if, the return level voltage is around or close to 0 volts?
The main control may not enable voltage to the fuel pump, if, the return level voltage is around or close to 0 volts?