First, make sure that ALL of the fuses in the block on top of the battery are OK- pull out the green 30a fuses and check them, they will often melt down without blowing. Check the cable from the positive to the fuse block to see if the copper looks dark and heated or if the insulation is melted looking.
If they are OK, then turn on the key (engine does NOT need to be running) and turn on the A/C button. The fans should run anytime the A/C is on.
If the fans turn on, then remove the small hose from the coolant reservoir, aim it into the top of the reservoir, and rev the engine up to about 2000rpm (best with two people, of course) The coolant flow should be steady, with no spitting and not a lot of excess air. If you get no flow, then chances are your impeller of the water pump is cracked/spinning free.
The coolant temp sensor is actually located in the coolant flange on the end of the head, just above the transmission. It should be a green plastic sensor, 4 pins. If the sensor is black, replace it for sure the black ones went bad all the time. If it is green, unplug it and check the connector for any signs of coolant migration out of the pins in the sensor.