Blower on my 2000 Ford Ranger stopped working. I have replaced the fuses, relays switch and the blower motor itself. It still won't work

Blower on my 2000 Ford Ranger stopped working. I have replaced the fuses, relays switch and the blower motor itself. It still won't work - 1

First, run a hot wire to the blower motor terminal to see if it works. Just a brief touch to verify it will spin.
Next, replace the blower motor resistor. It's near the motor itself, under the hood. This is most likely your problem. Check the plug end for any burnt or melted connections and replace that too if it's bad.

Could be a bad ground path wire or bad heater control/fan switch. The way the circuit works is that a 40 amp fuse supplies power to the blower motor relay via a black/light green tracer wire which in turn powers the blower motor via a pink/white tracer wire. There's also a 7.5 amp fuse circuit that powers the coil side of the blower relay which also grounds to the red/orange ground wire from the resistor. The coil side has to ground/ operate to close the contacts of the relay in order to power the blower motor. The orange/black ground path wire from the blower motor goes to the blower resistor and then onto the fan switch which both control the fan speeds and the wiring goes to ground from the fan switch. You need power and ground to complete a circuit so if the ground path wiring is bad, the circuit/motor won't work.

You can test to see if you're getting power to the blower motor relay or blower motor and if so, then test the ground path circuit to see where it is not getting good ground at the resistor, fan switch or heater control or the black ground wire from that to the ground screw location G104. G104 is a common ground point on the firewall or rear fender area for other circuits like front lamps, starter relay, etc.so it's not likely a problem with a loose ground screw if those other circuits work. If no power at the relay or motor, then check the wiring between them and the fuse.

Wiring diagram…
http://arrc.ebscohost.com/searches?car_uuid=1362765&filters%5Bservice_information_type_path_facet%5D=root%2Fmrt%2Fsit%2Fp5_diagrams&filters%5Bsystems_component_path_facet%5D=root%2Fmrt%2Fssc%2Fp5_air_conditioning%2Fheater_circuit

Is there power going into the switch? Is there power going into the resister pack on the heater box? Why you just throwing parts at it instead of using a cheap test light to see where your loss of power is?

Blower motor resister? Check the plug for corrosion.