Hi ,would like to know if anyone as an idea what is wrong with my defender 200tdi 1993 a could of weeks ago i went out stopped and it wouldn't restart? I had to jump it off ,it did this a couple of times more so i put a new battery on it and it was fine for a couple of weeks then did it again , so I've put a new alternator belt on checked and cleaned everything and its been ok for a week and its just done it again? Lights come on and when I turn key its just tik tik tik? Nothing? Wont turn over any ideas