Do these lights connect to the factory wiring harness?

These are designed as direct replacements at the bumper mounting location. Your existing truck harness and connectors will accept them without rewiring — they bolt into the same position as the originals.

Will I need to remove the bumper to install these?

Installation depends on your specific body configuration, but bumper lights typically mount from behind the bumper cover. You may be able to access them with the bumper in place, or removal makes the job cleaner — either way is straightforward with basic hand tools.

What if one light doesn't work after install?

Start by confirming the bulb is seated properly and the connector is fully clicked in. If the bulb is good and the connection is tight, check your truck's fuses and ground at the bumper bracket — corrosion or a blown fuse is the most common culprit on older vehicles.