Jump the wires on top of the receiver/drier...
the fan should work. You can also jump the temp sensor on top of the engine. The fan should work. There is a resistor on the inside the drivers' fender. See if it is still intact. What about the electromagnetic clutch in front of the engine. Is it working?
HOwever, start the basics first. Replace thermostat along with the coolant and check the expansion tank cap.