MY FORD F159 A 92 THE HEADLIGHTS GO ON AND OFF WHILE DRIVING.CAN U HELP ME.

 

a loose disconnection somewhere? See if you can trace your wires and make sure they arent grounding out somewhere.

 

Did you just replace the bulbs?

That happened to a pair of bulbs I got.....

 

tomorrow i am replacing the pig tails on my headlights. i installed some of those high amp bulbs and melted the plug. pull the pull the wires off the back of the bulb and you can tell. mine flicker on and off right now

 

installed new pig tails, lights are as good as new. i soldered and heat shrinked the splices. no off and on lights, and the pig tails are just a few dollars a peice

 

Ford seemed to have a little bit of trouble with their headlight switch, If you replace the switch, it should cure your problem.