haha it must be the wet weather or something i had the same issue, fixed it to
if you have alook the light assesmbly pulls apart into about 3-4 different sections, if you don't have a meter to test the voltages just give the terminals a good clean. failing that give the engine bay fuse box a rattle with the lights on and see what happens.
FIY there is only one connection in between the headlight assby and the fuse box, its located on the + side of the battery almost in the body work of the car if you put your ear next to it you will hear it click on and off.
good luck dude.