Head lights wont turn off

If you are saying the front side lights are going off but the headlights remain on ? then could you try this ? put the h/lights on main beam mode then whilst on main beam turn off lights if h/lights go off now ? then with lights still off put onto dipped beam with the switch/stick if h/light come on it is most probably the dipped beam headlights relay that has gone faulty as the h/lights have 2x relays 1for dip +1 for main beam if the above does not make any difference ? it may well be the switch assy hope this helps