Hi all, I have a reversing camera in my vehicle and one on the back of the caravan, both cable connected to the monitor. My problem is that the camera on the van shows up as very bright with excessive contrast compared to the one on the car. Any idea as to why they would be so different??? The one on the van is pretty much useless now, unless the contrast is turned basically to zero and then the one in the car is very hard to see. Any ideas????