04 dodge ram head lights

2004 dodge ram 2500 deisel 4door.ihave no left low beam head light.no power from WHITE/ blu wire.i have traced it all the way back to the fuse box under the hood.no power from under the fuse box. what do i look for next?thanks for anny help. 

are you saying that you have no voltage from the fuse slot to ground?

the WHITE/ blu wire runs from the headlight to under the fuse box under the hood.i have checked all conections and even split the harness and traced the hire all the way from light to fuse box ,im gitting no power from fuse box for this wire.i have checked all the other wires for the other head light an they work fine.ihave spliced the left low beam in to the right low beam for now.the (lampout) light in the insterment clucter is still on.