These head lamps are a little different in the fact that you have a body controller that receives what is called a CAN bus message from the switch and it interprets that signal and the BCM turns the lights on and off. This means you are not going to be able to tap directly into a switch or voltage feed prior to the BCM. The reason is, that voltage is only 2.5 volts and that is not enough to power your lights nor do you want to interfere with this messaging or a lot of stuff will stop operating.
Here is a guide on this type of system that will help explain what is happening:
What I would do is tap into one of the feeds from the BCM to the high beam itself. So whenever the high beams are on these lights will be on. Or you can tap into it and run a switch to the passenger compartment. Then you will need to turn the high beams on to power the switch, then you can flip the switch to turn these lights on.
Here are the wiring diagrams that show these two wires. Let me know if you have questions on this but you have a couple options so let me know if you need help talking through the best option. https://www.2carpros.com/articles/how-to-check-wiring
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Wednesday, January 20th, 2021 AT 6:25 PM