Do these mount at factory rocker points or do I need to drill?

These are designed to use factory mounting points — no drilling required. Test-fit the bezels before final fastening to confirm alignment with your bumper trim.

Does the switch wire into the existing wiring harness or do I need a separate power source?

The included switch connects to your vehicle's electrical system. You'll need to identify the correct harness connection points or run a dedicated circuit depending on your setup. Refer to your service manual for harness location and gauge requirements.

Will these need paint or are they ready to install?

The assemblies ship ready to mount. The chrome bezels do not require paint. If your bumper color differs from factory, you may want to mask and paint the housing to match before installation.