YEAH, ITS ALL IN SWITCH!*(where you turn the headlight on)..
I have took the switch out of undereth steer, and i have cleaned the switch where there is a copper look alike, its got 6 bars on it. and i put it back on, all of them works afterwards..(thats if you want to save money) but Rather buy new switch, it would be lot faster. alls you got to do is unplug the old one and plug the new one in and turn it on and drive away at nights!!
Good Luck...