screen upgrade

Hey Road Warrior, Upgrade your driving experience with our Ford® 8-inch MyFord Touch Sync 2 GPS Navigation System, a complete, plug-and-play solution that replaces your 4-inch base model display. This kit includes everything needed to bring your Mustang’s infotainment system into the modern era...

I recently upgraded my '17 base Mustang from a 4" screen to an 8" screen by following 4Dtech youtube video, everything work but.. However, the start button does not respond at all. Pressing the button does not activate any accessory power, nor does it initiate the engine start-up...