Will I need to run new wiring from the battery, or does this work with the existing car harness?

The switch mounts to the dashboard and the fog lights come pre-wired. Your specific harness routing depends on where your vehicle's factory fog light connector is located — check under the bumper area before ordering to confirm compatibility with the supplied wiring.

Do these mount into factory holes, or will I need to drill?

These are designed for factory fog light locations on your year and model. If your vehicle came with fog lights from the factory, the mounting points are already there. If not, drilling may be required — verify your specific trim level before purchase.

Can I install these myself with basic hand tools?

The switch bolts to the dashboard and the fog lights mount at the bumper. You'll need a socket set and a screwdriver at minimum. The wiring is pre-assembled, so no soldering required — just route the harness and connect to your vehicle's existing electrical system.