My old Plymouth Sundance had the low and high beams controlled by a JD1914 latching relay – you pulled the light stalk towards you to switch between high and low. Always thought it was a stupid design even if it was simple with one wire to the relay – throw back to the floor switch.

I much prefer the modern configuration where you push the stalk forward for high, towards you for low. I assume the turn signals and headlight bright control are a signal sensor that sends to the computer over CANBus which tells the computer to probably blip, well probably a JD1914 relay, because it’s cheaper than having two regular relays and you can keep old designs to this day and don’t have to constantly power the relay.