fog lamps

um i have no idea why it would do this, when i trun on my head lights then my fog lights, after about 5 to 10 min my head lights turn off, then they turn back on for a few sec the they turn off again, the fog lights stay on but not the head lights, have any ideas.

The built-in circuit breaker in the headlight switch is tripping. When it cools down it automatically resets. That's why you're getting the on, off, on, off...action.

A new headlight switch and you should be all set.