Both headlights on my daughter's '03 Protege5 stopped working last night. The low beams both stopped working at the same time. Both bulbs have been replaced within the last year. High beams on both work fine, parking lights and flashers work fine, but no low beams.

Also, at about the same time the lights quit working, her the battery light on her dash coincidentally came on too, briefly. She was on the interstate at that time.

I'm thinking either the headlight relay, or the headlight switch itself. A relay is only $21, but I hate blindly shotgunning parts, for nothing, and wanted to ask if this is a common problem, and if so, what the common cause is. If I don't get any leads, I will go ahead and try the relay, but if the headlight switches or something else is a common problem, then I'd rather try look into that first.

 

Grab a test light or multimeter and check for power & earth at the bulb sockets.