I have a issue with the rear camera not working on my 07 Escalade ESV. When the vehicle is put into reverse it does nothing on the Nav screen as if it was turned off. All the options are turned to the ON position in the Nav settings. I checked for power to the module under the passenger front seat and it has power. I went to the back and removed the lift gate interior piece looking for the camera connector. I located it and it had power going into the connector and coming out of the connector. My thoughts are if it was the rear camera it should display the service rear camera error on the Nav screen. I want to think its the module but if the module was bad would it let power run threw it???? The only other place i have to check is the rear connections on the Nav system itself but i dont think thats it. Any assistance would be great.