[deanewalpole]

Nice to be back!

I now work for LKQ and we often do BMW bits. A colleague yesterday had a customer asking for a module, which we did not do, but the control unit was something we stocked.

Presumably there would of been a back and forth to determine which our customer needed, but it occured to me the difference eludes me.

I have a vague feeling one takes commands from the human driver's inputs and, increasingly, various sensors and the other *sends* commands to mechanical parts to dip or dim etc.

I could be wrong on all of that. Can anyone assist please?

[DomMuc]

No 1 is Headlight COntrol unit ( controls motors vor up/down/left/right), checks bulbs and led´s switches them on/off
No2 is "starter" for Xenon bulb ( 15k Volts)

[deanewalpole]

Thank You.

What do you mean by starter please?

[BWBike]

Originally Posted by deanewalpole

Thank You.

What do you mean by starter please?

Think of the old type of fluorescent light tubes for your garage that uses a ballast to generate the voltage to light the tubes. It is like this, sort of.

[deanewalpole]

Thanks.

I have seen ballast referred to as well, on Partslink (which is what is in my image) and other OE lookup, so that scans.

The Control unit is more like a lighting 'brain' then, and the module is for the bulbs?