How to Change a Trailer Light Lens

Updated 06/18/2025 | Published 08/18/2018

Question:

How do I change the bulb it’s a sealed dome

asked by: Scott

Expert Reply:

I'm not sure if you are referring to a specific light but you should be able to pop off or unscrew your trailer light to change the bulb. For example the Wesbar Replacement Lens Set # 053522033360 has four lenses and unscrews in the respective lens corners while other lights you simply need to pry off the lens to get at the bulb and then pop the lens back in place.

expert reply by: Kyle S

Frank

6/18/2025

Thanks. I think that I have the pop off type under an external rubber gasket. I am concerned about breaking the lens when popping it off.

Kate F.

6/18/2025

@Frank Changing a trailer light bulb—especially the kind tucked under a rubber gasket—can feel a little intimidating, but don’t worry, you’ve got this. It sounds like your light uses a pop-off lens design, and with a gentle touch, it should come off without any damage. First, take a close look at the lens and the surrounding rubber gasket. You’re looking for any little gaps, notches, or corners where you might be able to sneak in a small tool. If the gasket is covering the lens edges completely, you might want to carefully peel back a bit of it with your fingers or a plastic trim tool. Just go slowly so the rubber doesn’t tear, it’s usually more flexible than it looks. Now, to actually remove the lens, use a small flathead screwdriver or (even better) a plastic trim removal tool. Slide it gently into a corner or edge of the lens. Instead of prying up quickly, use light pressure and sort of work your way around the lens little by little. The key is to take your time and avoid forcing it. If your trailer is older and the lens feels brittle, warming it slightly with a hair dryer on low can help soften the plastic and reduce the risk of cracking. Once the lens is off, you’ll have access to the bulb. Some bulbs pull straight out (if they’re the wedge type), while others need a slight push-and-twist if they’re the bayonet style. Pop in the new bulb, being careful not to touch it with your bare hands if it’s a halogen type (a clean paper towel or gloves will help here). A dab of dielectric grease on the base is a great touch to keep moisture and corrosion at bay, though it’s optional. Before you button things back up, give the light a quick test to make sure it works. It’s always satisfying to see it light up! Once you’re sure everything’s working, press the lens back into place and tuck the rubber gasket back around it. And that’s it! You’re back in business. Let me know how it goes Frank!