How to wire the bi-xenon heavy duty relay harness?
The relay harness allows the projector solenoids to power on when the high beam signal is requested. That means the projectors are in charge of changing the beam pattern from low beam to high beam giving meaning to the term “ Bi-Xenon”. There are no extra bulbs or a bulb that changes intensity inside the projector.
Make sure to mount the relay box with the wiring running down from the box and make sure to securely fix it in the engine bay and tie wrap all the wires to avoid getting any broken or damaged wires.