I noticed this evening that my light bar stopped working. I also got a weird error message (BMS_w035) today that went away after I parked and got back in to drive. When I got home I put the car in service mode and noticed it has a lot more error codes (some only service can see). The ones that were service only sounded CAN related. Of course the light bar is using a CAN interface to know when the high beams are switched and the lights are on/off. I'm hoping Tesla didn't change their CAN bus signals...
I'm on 2022.40.4. I have 2022.40.4.1 pending. I think I'm going to apply that and see if I get lucky and the FW update fixes it. If not I'll have to pop the hood and start checking the wiring for the light. After that it's contact the guy who made the interface.
CAN Interface
Lightbar
UPDATE:
One thing I'm noticing is when I throw the LBA switch to the ON position, it used to light up blue (it has a small LED inside the switch) and that is no longer happening. My current guesses:
1. Blown fuse?
2. Lose connection?
3. Malfunctioning CAN Interface/Reader or Lightbar?
4. Something changed with Tesla's CAN signaling and the interface/reader can't interpret the signals
If anyone smarter *cough*
@JzCastle or *cough*
@artsci *cough* wants to offer any suggestions, I'm all ears