Then you never read the post i left you about Diselgiant did you.If you had the speedo would read the right speed .You lift the needle over the stop anticlock wise and mark the face plate with a pencil ,before removing it ..On re fitting you put the needle on to the pencil mark and then push needle on , and lift it clock wise over the end stop .If you have no dash lights try the smal knob that sticks out from the front of the speedo face it adjusts the back lighting to dash . The potentiomiter should have been cleaned inside when you had the speedo head out .