I just upgrade from 03 headlights to 06..and i notice that when I turn the lights from low to high beams ... i heard this "gaka gaka" noises..is this normal?? i dont heard those sounds with my 03 headlights..~~

 

Yeah, happens on my car too. Almost sounds mechanical like there's some sort of toggle switch in the headlights themselves between the lo/hi beams.

 

it's a solenoid that's powered by the high beam power when you turn on high beams.

Traditional H4 halogen has dual filament, so when high beam is applied a separate power source powers the second filament creating high beams.

But on a Bi-Xenon projector like the one in 06. low beam remains on, it's the solenoid that blocks part of the light drops down to allow more light out, creating high beams.

 

so is this normal and safe?

 

yes