Do these require wiring to the factory harness?

These are designed to integrate with the OEM modular bumper connector. You'll need to run power from your battery or fuse block through a relay—standard fog light wiring. Your Bronco's service manual covers the relay diagram and fuse size.

Can I install these myself?

Yes. They mount at factory points using the existing bumper hardware—no drilling or cutting. Basic hand tools and a socket set are all you need. Plan 30–45 minutes per side if you're new to it.

Will these stay bright, or do the LEDs fade over time?

LED housings are sealed to prevent moisture and dust ingress, which extends lifespan significantly. If a bulb fails in the field, the LED unit is designed as a plug-and-play replacement—no soldering needed.