I just got everything hooked up in my 2002 sport trac and it works great except for the boyo reverse camera. I only recieve a black screen. I have turned the camera on in the settings. I tried different polarity, but I can't seem to get an image. I hooked the 12v acc to the yellow 12v constant in the wiring harness, the ground to the ground on the unit, and I plugged the rca to the brown plug. Did I do something wrong??