Moisture in headlamp
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Cadillac STS Forum - 2005 through 2012 Discussion, Moisture in headlamp in Past Cadillac Vehicle Discussion; I have had my car for over a month and washed it several times. but last night i notice condensation ...
  1. #1
    torogt is offline Cadillac Owners Member
    Automobile(s): 2006 STS 4 V8 White Diamond Pearl 1SG
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    Moisture in headlamp

    I have had my car for over a month and washed it several times. but last night i notice condensation in the headlamp. the lens is not cracked, anyone have idea how its getting in?

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  3. #2
    BaTu is offline Cadillac Owners Enthusiast
    Automobile(s): '05 STS4
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    Re: Moisture in headlamp

    It's the seal between the housing and the clear lens. Replacements are Very expensive it's the entire housing...

    BUT, good news is, you can fix this yourself! It's a simple job that's a bit more complicated when you find you need to remove the entire front of the car to do it though It actually looks like more of a job than it is.

    Do a SEARCH here, there are lots of posts about "condensation".

    Basically, pull the dz or more plastic clips and 4 nuts that hold the ft bumper cover to access the housing bolts and remove them Both (if ones leaking the others not far behind). Dry them out and reseal with silicone (I used Permatex Windshield Sealer, it a "watery" silicone that flows into sm cracks)

    Depending on your weather, I'd do it soon! It'd be less fun in the very cold.

    If you wait too long that water will stain the inside and ruin the housing...

  4. #3
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: Moisture in headlamp

    If you are under warranty, you can make a claim of 'excessive condensation.' Some members have prevailed.

    Good luck!

  5. #4
    turnerbend is offline Cadillac Owners Fanatic
    Automobile(s): STS
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    Re: Moisture in headlamp

    Had my headllamps replaced a few years back. Cost over $2500 for both. (under warranty).

  6. #5
    LAC_STS is offline Cadillac Owners Enthusiast
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    Re: Moisture in headlamp

    Yea it would be great if your under warranty. Water messes these headlights up quick.

    If no warranty then get em off and sealed up quick.

  7. #6
    torogt is offline Cadillac Owners Member
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    Re: Moisture in headlamp

    Quote Originally Posted by EChas3 View Post
    If you are under warranty, you can make a claim of 'excessive condensation.' Some members have prevailed.

    Good luck!
    My car is still under the corrosion warranty but I dont know if the headlamp would be included?

  8. #7
    STS_0423 is offline Cadillac Owners Member
    Automobile(s): 06' STS, 03' Mountaineer, 98' Civic Hatch, 04' R1
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    Re: Moisture in headlamp

    Quote Originally Posted by torogt View Post
    I have had my car for over a month and washed it several times. but last night i notice condensation in the headlamp. the lens is not cracked, anyone have idea how its getting in?
    ahhhh the age old problem for the STS....look at it this way, you are properly not a part of the STS owners group if you do not have this problem. I think this is the first problem most of us run into when we first buy the car. In other words, you are not alone, this is a problem for the entire STS fleet. Anyway, as you have already been told, you may try to replace it with warranty. If not, it is a relatively easy fix. You will have to take off the entire front clip of the car, DO NOT try to cut corner as you will most likely mess something up and will end up being more pissed off at the end. You have to take out the plastics in the wheel wells and there is a nut on the inside of the fenders. Other than that there some other bolts along the bottom of the bumper...take your time and don't rush. There are 3 bolts (I think, its been a while) that hold the light housing in. Once you take out the housing, just put in a good water resistant silicone along all the cracks and where you think water would get in. I did this about 1 1/2 ago and never looked back. I have never had a problem since. Plus look at it this way, doing it yourself would give you great practice when it is time to replace a 30 cent light bulb that the dealership would want to charge you over $100 for in labor.

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