No Oil Pressure Indicated

I have been trying to find a service manual online for my car. My guage shows no oil pressure even though it is full. I have a loud noise coming from under the hood and as I am looking at the engine, on the bottom left their is a section the serpentine belt turns that was making a grinding noise and periodic sparks. Where is the Oil pump located on this car. Money is tight so I need to be able to do this work myself. Thanks

Jim