Will this work with my factory wiring harness?

It's designed to bolt onto existing tailgate mounting points. Verify that your truck's wiring connector matches this unit before final purchase — some model years have different plug configurations.

Do I need a harness adapter or relay for the LED?

LED lights draw less current than incandescent bulbs, so some trucks may require a load-equalizer module to prevent hyperflashing. Check if your Ram's factory system needs this before installation.

Is the lens sealed against water and dirt?

Hard panel construction with integrated LEDs is sealed from the factory. Once mounted, it's weatherproof — no additional sealant needed at the bolt points, though standard practice is to use a bead of silicone where the tailgate meets the light.