lyricalpan

I've never posted before, so I hope I'm doing it correctly. I have a 1977 Ford establishment, and I can't find the water pump, which needs work. It only produces water flow sometimes, though when switched on, it is audible every time. But the sound does not help me. Does anyone know where it is? If so, please send info to me at lyricalpan1@yahoo.com. Thank you.