Stereo Problem

I have one of those all dancing all singing do everything units. It works fine, dab radio, cd, dvd, Bluetooth music from my phone, hands free, sat nav, rear view camera, ah but, according to Rapido I should be able to hear anyone giving me directions via the built in mic in the camera, but I don't, not a dickie bird. I have been through all the settings and have it taken out to see if there is anything I can do but so far nothing. Ruairi, at LTS is trying to find out something but so far no success. So if anyone here has an idea I would be eternally grateful. I don't particularly need to hear someone speaking to me from the back of the van, but the way I see it is, I've paid for it so it should work.
Pictures attached to assist anyone with a knowledge of wires.

Think the yellow wire could be used to reverse the picture, ie if using the camera as a rear view mirror instead of a reversing camera.

Hi Michael, can't see that there is a dedicated audio input for your reversing camera. You could try connecting the RCA plug (Red One) to the other audio sockets (red or white) in turn and see if it works for you. I have my doubts, but you never know your luck.

I have a Pioneer AVH-X8700 and the connections on the rear are very similar to yours. There is no dedicated audio input connection for the rear view camera on my radio and I can't see one on yours either.

You can do a simple test by just selecting reverse and checking if the sound from your radio, i.e radio station playing, mutes. If it does mute, then your unit has switched to another channel, and is looking for sound input from that source, i.e. rear view camera. Otherwise, if the radio channel continues to be heard, when reverse is selected, then you do not have the facility for sound input from your camera.

I had a quick look at the installation instructions for your unit and I can't see any reference to audio input for the rear view camera.

The yellow wire that you asked about does not appear to be required in your setup but it would be helpful if you had the manual for the camera for further information.

The microphone is for use with your phone (Handsfree) while making, or receiving, calls. The rear view camera connection shown in the illustration, as I said previously, does not show an audio connection.

I think you will just have to suffer in silence.