I have posted a variation of this on here before, but I have narrowed the problem down a bit more. Background: My headlights seem to randomly go off every once in a while and then come back on...this has been an increasing problem as of late. It seems to happen independant of bumps or rpms, so I don't think its a lose wire like that. I have narrowed the problem down to the passenger side headlight, whenever it is not installed the driver works great, but if it is the only one in it still blinks. Argh, worst of all if it is in it does both headlights at once, so it seems like they are connnected on this problem. What could it be, and how can I fix this. I have no clue about electronics to pictures would help huge.

 

I have the same problem when my fogs are
on.
I think there is a auto reset fuse in the
headlight circuit.

Probably age has lessened the trip point.

 

Ok where can I find such a fuse. Is it the whole headlight relay, or is it something else. I just need to know what to do so i can fix it.

 

I am not sure what car you have, so here is my story. When I had my 94 GT, I had the same type of problem... I was once on a long road trip, driving at night in the middle of nowhere, with my foglights and highbeams on... when I turned the highbeams off, my lights went off for a few seconds... I about had a heart attack... anyways, when I started looking into it (in one of the Mustang mags) I found that this was a common problem and there was a fix for it. It went along the lines of some wiring module that was overheating due to the fog lights and lights being on at the same time... I just never used my highbeams or fog lights ever again...

 

Have you tired a new headlight switch? The left and right h-lights have their own set of wires.
Also before buying the switch, try a "wiggle test" on any wires going from the h-lights to the switch. If you wiggle the wires with the lights on and the one light goes out you've found the general area of the problem. Then repair the broken wires.