only you can tell what hose is leaking. and the hoses clamp onto the alt bracket, not the water pump.
i also had one of the heater hoses go bad, the end swelled up and was no longer able to seal shut, and dripped. what i did was took the hose off went to the parts store and tried to match one up. crazy thing is one side of the hose has to be fatter than the other side. the heater core inlet is fatter than the alt bracket water tube.
sometimes you can cut off 2 inches of hose and re install it. that gets rid of the worn out part at the end of it.
