Headlight Switch problems of the 2000 Mercury Grand Marquis

I was driving on a two lane road after dark when suddenly the headlights went out and a very loud buzzing noise occurred simultaneously in the dash. I was able to slow down safely because two cars were meeting us and their lights afforded enough vision to keep my car in my lane. I pulled off the road and tried various positions with the light switch and high and low beam switch. All the lighting seemed to work except the headlights. Finally, I turned off the ignition. When I restarted the car the lights came back on and we drove on home very carefully. They have worked since but I am very wary of driving after dark. The buzzing noise quit, also, and has not returned.

I was driving home on a dark country road with my granddaughter in the back who is 3 1/2. Had the high beams on. Lost headlights, dash lights, tail and break lights. If it wasn't for knowing the road and no other vehicle was around would have caused a bad wreck. There are a lot of lakes and hills around where I drive. Hit the breaks an came to a stop flipped the headlight switch a couple of times and changed to dim lights and everything came back on. This has happened before and it is only when the high beams are on. If this would of happened on a highway or with other vehicles around hate to think of what would happen. Ford says there is no recall on this problem. It has happened a few times but with the part being over 600. 00 and then paying someone to put it in. I can't afford to do anything.

Driving at night with high beams on. After an extended time ,at least an hour, headlights went off. Switched to lo beams and they came on, switched back to high beams and they went off again. I have a 1994 Grand Marquis and it does the exact same thing. Replaced the headlight breaker and still have the problem.