I've installed a reverse camera on my Tourer and connected it to my new head unit, and the video signal gets sent to it when I select the reverse gear. So far so good! The thing is; my head unit has a wire that the manual says should get connected to the +VE reverse light wiring (it doesn't need a -VE). I've already soldered the +VE and -VE wires from the camera to the light bulb wiring (by the connector) inside the hatch. And I've connected the video cable from the camera to the back of my head unit. On my head unit, the only way my setup seems to work is if I enable the camera to come on both when reverse gear is selected AND when the touchscreen display isn't used for a few seconds. Obviously no image will get displayed because I spend most of my time driving in a forward gear lol If I disable that option, the camera feed doesn't show when I select reverse gear! So, am I right in assuming my head unit needs the +VE wire from the reverse light circuit? If so, is there some wiring I can splice into by the dashboard? I'm not really enthusiastic about running another length of wire to the back of the car, and finding somewhere else to splice into. Removing all the trim panels was a PITA if I'm honest; not sure I want to go through all that again just to run a thin wire! I know I can just 'live' with the current setup but I want it to be perfect. I have a Pioneer MVH-AV270BT head unit if that helps, and here is the operating manual for it (reverse camera setup is on page 22 to explain my setup above). Thanks.