Hi,

You asked “What do you mean by "Controller box" ?

It is considered a function controller or even a monitoring box.
On many newer cars they are referred to as “black boxes” because things unknown relates to being in obscurity. A mystery gift or grab bag that surprises!

In many cases of the automotive world a black box is a computer or code box and it sends signals to several components.
No separate wiring feeding around as they go right down the power wires to a receiver in the component.

If you need some more explanation as I did, it boils down to an acronym CANbus and decoders.

This started coming out in RAM vehicles just about the time your car was manufactured.
GM and Chrysler sniff around all kinds of vendors with gimmicks to sell from both sides of both ponds.
Global sourcing has never been a new thing but it is a lot larger than most can imagine.

Since you said it was a lighting of directional signals and headlights being HID. (high-intensity discharge)
Then there the newest replacements LED. (Light emitting diode)

I was also thinking that maybe you have changed out bulbs somewhere in the past?
Headlights or taillights?
Maybe a conflict with Crossover conversions numbers.

9003 is the same as H4
9008 is the same as H13
9145 is the same as H10
HB2 is the same as H4
HB1 is the same as 9004
HB3 is the same as 9005
HB4 is the same as 9006
HB5 is the same as 9007
800 is the same as 880

Every once in a while I will see headlights in my rear view mirrors where a car lights will be swirling tiny circles or shaking. They are usually of bright white intensity or more bluish than normal.
At first I thought a strobe or emergency traffic control vehicles.
It’s weird how the mirrors show it to me but when they are driving on by they look steady.
That is looking onto them with eyeballs and no mirror.

I right it off as to junk aftermarket bulbs.
Seems that every “mother’s uncle” is selling stuff made in China with spins of various power or luminosity ratings all over the place.

Some to consider while isolating a cause.

Phil

Phil