You can find the latest versions on the Steam Workshop or community mod sites like ETS2.lt. If you're having trouble getting the lights to turn on, Interior Light & Emblems Part 1 - Steam Community

The community often uses specific "add-ons" to change how the lights are toggled:

: Due to Steam Workshop file size limits, the mod is now split. To get all available updates and emblems, you must subscribe to both Part 1 and Part 2 .

The mod for Euro Truck Simulator 2 (ETS2) adds customizable lighting and rear panel emblems to a wide variety of trucks. While v9.0 is an older iteration, the mod has since evolved into multiple parts to accommodate more content. Key Features & Functionality