Do these plug directly into the stock wiring harness?

These mount at factory locations, but wiring compatibility depends on your vehicle's electrical connector type. Verify connector fit before finalizing installation — you may need a plug adapter or to splice into existing harnesses.

Will the amber corners work as turn signals?

Yes. The amber corner lights integrate both turn signal and corner marker functions into the single housing assembly.

Can I use these with the factory low-beam bulbs?

The DRL and corner functions run on LED circuits. Your low-beam configuration depends on what the housing supports — confirm with a test-fit or reach out with your specific vehicle details to avoid compatibility issues.