Been having this problem ever since I swapped my turn signals in the bumper. It only seems to happen to the passenger turn signal. I haven't gone through water or anything but it builds up moisture and the turn signal goes out. Any solutions to this?

 

It has to be a seal in that bulb that is getting moisture. Repair or replace that turn signal housing. It is pretty simple to remove. You can probably pick a replacement at a u-pull-it junk yard for pretty cheap.

 

I ended up using the old housing for the bulb. The o-ring on the new one seem to be cracked. Hopefully this fixes it. Thanks.