I have a 93 4 door civic. For the last couple of days, I have have been driving, and out of nowhere the headlights dim really hard and then shut off. I have to flip them off and then back on to get them on. Does anyone know whats going on, or where I should start to look? Thanks.

 

check the connector to the bulb itself, mine did that and when i went to change my bulb my wires were fried

 

First check the bulb connector like TurboSI24 said, second try this..
http://www.b18c5eg.com/how2/lightswitch/

 

might be your altenator??

 

your combination switch might be bad, that happened to me and when I replaced the switch it worked fine

EDIT: Just read the link above. That looks like something that you should try. I just bought a whole new switch but if I saw that link before, that is what I would have done

 

I also had a problem like that. My headlights dimmed really bad at idle to the point of shutting off. I replaced the switch and grounds to help stop the dimming.