When I turn them on, you can hear a sound in the engine, is that normal...only happens when I turn them off and on.
There's a mechanical "shutter" that cuts off the upper beam for low beam operation and moves up in high beam modeWhat?
Kewl,There's a mechanical "shutter" that cuts off the upper beam for low beam operation and moves up in high beam mode
its an electric solenoid that accomplishes this.
the '15+ use this shutter setup whether its halogen headlights or HIDs
on the '08 - '14 LC series, only the HID headlights (projector lens & shutter) the halogen lights used a dual element bulb and conventional reflector housing reflector
if you have ignition ON (engine not running) and headlights ON and operate between low / high beam, you can hear the "clunk" sound of the shutter mechanism
(on Euro models this was referred to as Bi-Xenon (with 2 headlight layout) and really what it meant was dual mode function)