I have a 1979 Deville. The light were working fine until I turned the bright lights on and they wouldn't turn off. So I had to ride with my brights on. Next, about a week later one night the headlights would cut turn off and back on again. now the headlights wont turn on just the parking lights. Can someone please give me some advice on how to fix this problem. I miss driving my caddy at night.