306 fuel gauge is not working?

i have already replaced the pump thinking it was that but it wont.HI IF THE PROBLEM IS IN THE DASH UNIT WOULD IT BE EASYER TO GET A HOLE NEW DASH MY GAUGE DOES MOVE IF YOU REMOVE THE HS FUSE THEN PUT IT BACK IN THEN IT JUST GOES BACK TO EMPTY AGAIN WOULD IT STILL BE A PROBLEM IN THE DASH