ONe headlight got fogged up..
if you recently cleared your headlights, that would be your problem there. you didn't close up the housing well enough. if not, condensation got in there some other way, and i won't give bad scoop so i'll let someone else follow up.
Figuring that Nhan's sig would indicate if his corners were cleared or not, I'll go with 'not' for now. And if that's the case, Nhan, have you recently either 1) driven through extremely torrential rains recently or 2) did you wash your car in some manner different than normal or 3) did you recently replace any bulbs in that headlamp?
The S2000 headlamp assembly has a few characteristics that are worth noting for any of the above scenarios. The highbeam is capped by a rubber seal. That seal has two lower vents (actual weep/vent holes) that are necessarily there to allow heat to escape the headlamp assembly. If those vents weren't there, and your headlamps developed enough internal heat, something would give
. At the same time, enough repetitive ore pressurized water forced unnaturally into the front of the car (either by driving for an extended torrential downpour or forcing water in to areas unintended -- the weep holes) could theoretically allow some moisture to invade. And of course, if you were to have recently replaced any bulbs, all it takes is to have mis-aligned the entry of the bulb's socket thereby not creating a water-tight seal.
Bottomline, it *is* possible...but highly unlikely to happen. If none of the above scenarios were yours...it can always "just happen."
But now...what to do about it. Best thing is this:
Folks, it really only takes a very small amount of water trapped inside a headlamp to cause a terrarium-effect of fogging. The steps offered above should allow for complete evacuation of any such moisture.
Good luck!
- Dave
The S2000 headlamp assembly has a few characteristics that are worth noting for any of the above scenarios. The highbeam is capped by a rubber seal. That seal has two lower vents (actual weep/vent holes) that are necessarily there to allow heat to escape the headlamp assembly. If those vents weren't there, and your headlamps developed enough internal heat, something would give
. At the same time, enough repetitive ore pressurized water forced unnaturally into the front of the car (either by driving for an extended torrential downpour or forcing water in to areas unintended -- the weep holes) could theoretically allow some moisture to invade. And of course, if you were to have recently replaced any bulbs, all it takes is to have mis-aligned the entry of the bulb's socket thereby not creating a water-tight seal.Bottomline, it *is* possible...but highly unlikely to happen. If none of the above scenarios were yours...it can always "just happen."
But now...what to do about it. Best thing is this:
- Jack up the front of the car on that side
- Remove the wheel
- Remove the retaining clips located here and there in the front of the plastic wheel well
- Fold back the plastic wheel well to reveal the exposed rear of the installed headlamp assembly
- Wipe the rear of any large amount of dirt, dust or debris as you won't want anything to dislodge and fall into the headlamp assembly
- Disconnect the turnsignal and parking/running light bulb sockets
- Disconnect the wire assembly socket from the highbeam bulb
- Remove the rubber gasket cover from the highbeam bulb (but no need to remove the bulb itself)
- Now, grab a hair dryer and position it in a manner at the opening of the highbeam area so as to allow the warm dry air into the headlamp. There is NO need to be *right...up...on...it* -- 6-12 inches back should suffice.
- Let the hair dryer do its work for 10 minutes or so. You want to allow enough time to evaporate and purge the water from inside the headlamp assembly.
- Put everything back together in reverse order making *absolutely* sure that you've seated bulbs and such flushly and firmly.
Folks, it really only takes a very small amount of water trapped inside a headlamp to cause a terrarium-effect of fogging. The steps offered above should allow for complete evacuation of any such moisture.
Good luck!

- Dave
Originally Posted by w1ngman,Aug 26 2004, 04:39 PM
Figuring that Nhan's sig would indicate if his corners were cleared or not, I'll go with 'not' for now. And if that's the case, Nhan, have you recently either 1) driven through extremely torrential rains recently or 2) did you wash your car in some manner different than normal or 3) did you recently replace any bulbs in that headlamp?
The S2000 headlamp assembly has a few characteristics that are worth noting for any of the above scenarios. The highbeam is capped by a rubber seal. That seal has two lower vents (actual weep/vent holes) that are necessarily there to allow heat to escape the headlamp assembly. If those vents weren't there, and your headlamps developed enough internal heat, something would give
. At the same time, enough repetitive ore pressurized water forced unnaturally into the front of the car (either by driving for an extended torrential downpour or forcing water in to areas unintended -- the weep holes) could theoretically allow some moisture to invade. And of course, if you were to have recently replaced any bulbs, all it takes is to have mis-aligned the entry of the bulb's socket thereby not creating a water-tight seal.
Bottomline, it *is* possible...but highly unlikely to happen. If none of the above scenarios were yours...it can always "just happen."
But now...what to do about it. Best thing is this:
Folks, it really only takes a very small amount of water trapped inside a headlamp to cause a terrarium-effect of fogging. The steps offered above should allow for complete evacuation of any such moisture.
Good luck!
- Dave
The S2000 headlamp assembly has a few characteristics that are worth noting for any of the above scenarios. The highbeam is capped by a rubber seal. That seal has two lower vents (actual weep/vent holes) that are necessarily there to allow heat to escape the headlamp assembly. If those vents weren't there, and your headlamps developed enough internal heat, something would give
. At the same time, enough repetitive ore pressurized water forced unnaturally into the front of the car (either by driving for an extended torrential downpour or forcing water in to areas unintended -- the weep holes) could theoretically allow some moisture to invade. And of course, if you were to have recently replaced any bulbs, all it takes is to have mis-aligned the entry of the bulb's socket thereby not creating a water-tight seal.Bottomline, it *is* possible...but highly unlikely to happen. If none of the above scenarios were yours...it can always "just happen."
But now...what to do about it. Best thing is this:
- Jack up the front of the car on that side
- Remove the wheel
- Remove the retaining clips located here and there in the front of the plastic wheel well
- Fold back the plastic wheel well to reveal the exposed rear of the installed headlamp assembly
- Wipe the rear of any large amount of dirt, dust or debris as you won't want anything to dislodge and fall into the headlamp assembly
- Disconnect the turnsignal and parking/running light bulb sockets
- Disconnect the wire assembly socket from the highbeam bulb
- Remove the rubber gasket cover from the highbeam bulb (but no need to remove the bulb itself)
- Now, grab a hair dryer and position it in a manner at the opening of the highbeam area so as to allow the warm dry air into the headlamp. There is NO need to be *right...up...on...it* -- 6-12 inches back should suffice.
- Let the hair dryer do its work for 10 minutes or so. You want to allow enough time to evaporate and purge the water from inside the headlamp assembly.
- Put everything back together in reverse order making *absolutely* sure that you've seated bulbs and such flushly and firmly.
Folks, it really only takes a very small amount of water trapped inside a headlamp to cause a terrarium-effect of fogging. The steps offered above should allow for complete evacuation of any such moisture.
Good luck!

- Dave
I had a problem with condensation in one of my headlights and found it was caused by a loose turn signal bulb socket.
I followed the same method suggested by w1ngman except I let the car sit in the sun for a few hours with the rubber gasket from the highbeam bulb removed and the turn signal bulb socket removed.
I haven't had any problems since.
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