95 Nissan Pickup 4x4 V6

My truck has been sitting in my backyard for about three months untouched. I changed the oil out and then tried to start it with no luck.

The battery is new and seems to work fine; all the lights etc work. I took the battery out of my car and put it in the truck with no success as well.

When I try to start it I hear a click then a whirring sound. The whirring sound continues until i stop turning the key. When I removed the Fuel Relay and the whirring sound stops; then I hear only a single faint click from the engine bay.

Any Ideas?

Thanks