A couple of years ago I installed a backup camera (somewhere in the best mods for 50 section but I couldn't find it). Everything worked well until I built an off road trailer. Due to the location of my spare tire I couldn't see the trailer at all. Installed the camera - problem solved...sort of. The camera eased the process of backing up to hook up the trailer. However, I still could not see the trailer while towing. Not good. Today, i finally disconnected the camera from the backup lights and wired a separate/dedicated switch to the camera so I can monitor the trailer while it is being towed.