Troubleshooting Common Headlight Problems on a 2018 Dodge Ram 1500 industrymag.org

Seeing moisture or fog inside your 2018 Ram’s headlight lens is frustrating and can lead to bulb failure and corrosion. This is usually caused by a cracked housing, a failed seal, or missing vent caps. On the Ram 1500, a common failure point is the rubber vent tube on the back of the housing—if it becomes disconnected or clogged, moisture cannot escape. Solution: remove the headlight assembly, dry it thoroughly with a heat gun on low setting, inspect the seal for gaps, and reinstall the vent properly. For persistent condensation, replace the entire housing.