Dash lights flashing

4hi/4lo flashing with abs and Trac control lights steady on. The code is transfer case switch failure. Can a weak alternator also throw this code. My alternator is about 50%

 

Bad battery/alternator can cause all kinds of alerts, lights, etc in a Tundra, so yes, possible. Or you could have more than one issue. I would get the battery and charging addressed and see where you are after that system is verified functional.

 

I don't think anyone wants me to flash them lol

 

Check out the diagram in this thread. I would pull the codes too. If its blinking like that there is almost deff a stored code.

https://www.tundras.com/threads/maintenance-light-on-4lo-flashing.74531/