CHEVROLET TRUCK TRANSFER CASE ENGAGE

My Truck Wont Engage In Four Wheel Drive It Keeps Blowing The Fuse

When Accelerating My 4x4 Cevy Truck It Seems Like The Transfer Chase Want To Engage.

I Have A Clanking Noise Around My Bellhousing When I Idle And Up To Bout 1300 Rpm And Then It Smooths Out And Then When I Slow Down It Does...