It will come when the hand memorizes where it is supposed to be in relation to the fiddle. My palm touches the body of the fiddle and that feeling is how I know where I am.
Also doing one finger scales helps teach the hand and ear. You can just do open, first finger, move first to where 2nd would fall, move 1st to where 3rd would fall (if were still in first position) and check with open string. Then go back down (instead of completing the entire scale).
