Do these bolt straight into the factory locations?

Yes. These mount at factory rocker and bumper points — no drilling or cutting required. Use existing holes and fastener locations.

Is the wiring harness long enough to reach from the engine bay to the switch location?

Wiring harness is included with the assembly. Run it through the existing conduit along your driver's side frame and up behind the dash to your preferred switch placement. Standard routing takes 30–45 minutes.

Will these work with the factory grille, or do I need a different one?

These are designed to fit factory openings on RAM trucks from this generation. If your grille is aftermarket or heavily modified, test-fit before finalizing mounting.