Here are your instructions for removing the headlamp assembly.
First you have to remove the front bumper cover.
5.If equipped, disconnect the fog lamp electrical connectors.
6.Remove the lower front bumper cover bolts.
8.Lower the vehicle
9.Remove the two upper bolts (one each side) and the front bumper cover
Removal and Installation
NOTE: Make sure that the headlamp switch and the ignition switch are in the OFF position.
Ok, I got the assembly out and drained the water. I can't seem to find any cracks.
Any idea where these headlight assemblies leak? Could it be one of the bulb holes?
It could be around the seems. You can try and get some sealer and seal around it,but due to the labor involved getting to it that would be something you would have to think about.
I guess you could try if you access to shop air,submerge it in water with the light bulb hole up and shoot some air into the headlight and see if you can get some bubbles to see where it may be leaking.