THEORY OF OPERATION
The Camera is activated when the ignition switch is in the RUN position. The (F71) circuit supplies power to the camera. The camera sends a video signal (std. NTSC i.e. TV) to the navigation radio, using circuits (X970) camera signal, (X971) signal return and (X972) camera shield, which displays on the navigation screen. The screen toggles functions displaying only one kind of image at a time. And in reverse, the rear camera has priority. The (Z914) circuit is ground for the system.