Civic Headlight Gone/Electrical Problem

[Field Master]

Guys,
I'm driving my civic last night along C5. Then I noticed that my high beam indicator on my dash lit on. I pulled the steering stick to switch from high to low beam, however nothing happened. I gas up at C5 shell so I got the chance to inspect my headlight. It turns out that my headlight is not lighting anymore, It was only the foglamp that lighted the street. All I thought before I stopped for gas is that my headlight is on high beam. So the foglamp is working so is the park and turn light. As I switch on the headlight the high beam indicator will light up but the headlight will not turn on.
What do you think guys causes this?

One more thing, yun isang fuse ng pajero nagmelt yun plastic body. I still don't know what this fuse for as the label of fuse box fade already. The fuse is not busted just the body melt. Ano rin kaya cost nito? Delikado ba ito?

[nicolodeon]

Yung sa nag melt na plastic body, minsan kasi yung mga contacts eh nagiging corroded na. Kapag may corrosion, nagka-karoon ng heat source - corrosion generates heat. But, this is just one of the possible causes. Delikado? Ummm...medyo kasi it might start a fire. When a heat source reaches the right temperature, it would ignite.

Dun sa headlight mo, kung naka-relay ka, baka may tama na yung relay mo. Tingnan mo rin yung sockets mo na nakakabit sa headlights and check yung wirings nya.

[BlueBimmer]

maybe burned out na filament ng H4s mo..pero unlikely since sabay di gumagana low beams mo..