1997 Toyota Corolla Car over heats because my radiator fan

I've replaced the sensors, the switch, and it still will not come on. My Hot/Cold gauge doesn't go to hot, but after I drive it for awhile the back up plastic tank that you put coolant in is bubbling and the car smokes out of the tail pipe. I can fill the car up with water and it will smoke out the back (I'm guessing) until all the water is evaportated. I was gonna check the thermastat and when I disconnect the 2 bolts that holds the hose in place and try to take it off, the fan pops on and won't turn off until I put the hose back. It is also making a clicking sound every time the fan starts up, almost like a short circuit. The noise is coming from 1 of the 2 black boxes that are located on the far front ride side of the car when you pop the hood. I do not know a lot about cars so I apologize if this is confusing.