Hi guys, I have the same problem, I loose headlights with no reason.
At the beginning I thought it was a battery issue, due to no voltage in bulb terminals but it doesnt. I checked the whole wiring system with a meter from bulb sockets to one of the fuse terminals searching for some broken wire but nothing, It has 0 ohms resistance. then I checked from the other fuse terminal to ground (Turning the switch ON obviously) and supposedly it should read some voltage, doesnt it? And nothing.
Fuses are Ok, Bulbs are Ok, Wiring are Ok, wth??
Is there any relay or electronic part that plays a role in the electrical system that I had not checked? Any clue?
I dont believe that the starter switch is the problem.