Fog/Moisture in headlight

[jorswift]

I just replaced my headlight bulbs and turn signals in 2015 sierra with LED.  I am getting some moisture or fog in one of the assemblies after driving the truck a bit.  It doesnt happen in both, just one.  Any ideas?  Thanks.

[boettcher40]

Sounds like the dust caps aren't on correctly, assuming you didn't have issues before you swapped to LED?

[jorswift]

1 hour ago, boettcher40 said:

Sounds like the dust caps aren't on correctly, assuming you didn't have issues before you swapped to LED?

Correct, no issue before.

[Gregory Krisa]

Yea the way I got moisture in mine was leaving the caps off after doing the hid upgrade till I could get a unibit to make the holes.
To get the moisture out I left the lights in high beams for an hour and then resealed it I still have some moisture left noticed in the cold so maybe worth drilling a hole and adding the gortex patch over it

Not sure of the LEDs will get warm enough to push the moisture out

Sent from my Pixel 4 XL using Tapatalk

[jorswift]

I checked the bulb and dust cover, both seem to have good seals and be tight.  I also changed the turn signal bulb, would this also cause the issue?  I dont notice it with the DTL on, only after a good bit of driving with the headlights.