Ok I'm going crazy here. I moved the mute wire to the pin above it, grounded everything along with the parking break sensor, and I still have no nav or video. I unhooked that method and bought the PAC TR7 adaptor from a local shop, hooked it up, and that didn't work..now that dealer is telling me I need to do both, the moving of the mute wire to a different pin and ground it, and use the TR 7 adaptor...I had my dash open a dozen times the last few days trying to get this to work...this unit is brand new , and someone else told me that moving the mute wire and grounding it no longer works alone