You can't? Are you replacing a rearview camera? Does that camera have it's own memory card? Is the USB just a power cable or are you trying to route the video through the radio?
You can't? Are you replacing a rearview camera? Does that camera have it's own memory card? Is the USB just a power cable or are you trying to route the video through the radio?
most dash cams do not tie to a head unit. there's simply not a reason for them to display on a head unit, they're there to record, if you need to view the footage, you take the card out to a PC or in a real pinch watch it on the tiny screen on the cam itself.