Horizon12: Firmware Update and Revision History

This article provides the latest and all previous firmware versions for your HORIZON12 radio, including a revision history. 

Here is a link to a video tutorial on the firmware update process using the Horizon10 as an example:

Current Firmware

Version 12-11-2025

• Fixes issues seen with the display screen not working
• Adds turn signal volume adjustment for GM integrated kits
• Improves general functionality

Legacy Firmware

Version 05-23-2025

• No details provided

USB Drive Requirements & Setup

• A name-brand USB 2.0 drive no larger than 32GB.
• The USB drive must be formatted to FAT32.
• No files should be on the USB drive aside from the firmware.