I'm not sure if this issue was mentioned yet, but with my experience the light script you are using seems to break all of the other BeamNG vehicles where none of their lights work
I tested it out and it need some work, there’s mesh clipping in a lot of places and some bad panel gaps also the interior is very dark otherwise 10/10
I remembered seeing this truck in FS19, and FS22 as a mod on the modhub originally for 19 in 2021, did you get permission to use the model? asking mostly because I saw no mention of it anywhere here Link to the FS19 mod https://www.farming-simulator.com/mod.php?lang=en&country=us&mod_id=220441&title=fs2019