After having a broken motor mount replaced, then my transmission replaced, then cam sensor replaced...immediately my head lamps come on but immediately go off....both manual and automatic settings. It has only been a couple of days and I am taking it to the dealership today to see what's wrong. The shop that put in a new cam sensor just 3 days ago says they don't have a clue as they checked for loose wiring etc and cannot find the problem. They take no responsibility for causing the problem while they had it replacing the cam sensor and suggest I take to the Nissan dealership. If I find out they did something to cause this headlight problem, it will be hell to pay.