The Furrion Vision S Wireless RV Observation Camera System Item # FCE48TASL-05 only needs power and ground to function as the observation system. This is the easiest way to install and use the cameras. The screen will allow you to have all cameras on at one time in a split screen format. I have included a link to an installation video on a 2009 Forest River Cedar Creek and a 2019 Keystone Cougar. It sounds like you may have miss wired the cameras. Keep in mind the running lights must be... view full answer...
The two wires coming from your brake assemblies on your hub are for the brake magnet. One wire is ground and one wire is for power from the brake controller. It doesn't matter which wire goes to what in this situation.
Take a look at the video at the 5:45 mark about how to wire up the trailer brakes I included for you too. view full answer...
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