Use this harness to retain the factory reverse camera when adding an aftermarket radio. This harness is designed to retain the factory backup camera so it can be viewed through the display screen on the aftermarket radio. Works with Factory OEM installed backup camera. Use with aftermarket radio that has a backup camera input feature only- usually radio with video screen. Compatibility Notes: New aftermarket radio must have backup camera input capability. Only works with certain vehicles that came with Factory Navigation or No Factory Navigation- See Below. Compatible vehicles: Only works with certain vehicles that came with Factory Navigation or No Factory Navigation: Made for Ford: 2009-2014 Expedition w/NAV -Factory Nav vehicles only, 2010-2014 Mustang w/o NAV -No Factory Nav vehicles only, 2011-2016 F Series F-250/F-350/F-450/F-550 Super Duty w/NAV -Factory Nav vehicles only; Made for Lincoln: 2009-2014 Navigator w/NAV -Factory Nav vehicles only