I'm not sure I understand the question since the stock headlights and the most of the LED replacement headlights being discussed here are separate from the parking lights. I have the WHDZ's from Amazon. They are plug and play with the stock headlight harness and have no connection to the parking lights. That said, If you have a fancy LED headlight that has a parking light within its enclosure, then it would have to be wired into the parking lights harness somehow so they would receive power when the parking lights are turned on without the headlights.