JimY, the aux pump is between the wall of the engine conpartment and the fire wall, right beside the mono valve. You can just bearly see it under two hoses. The wall towards the motor has 4 screws that will alow you to gain enough run to remove the aux water pump. I can not see the wiring for the pump, as I would like to test it, but It looks very old, so I will have to remove it to test it. steve