You have the same problem as RV service centers. There is no way to test systems. The Factory Service centers will swap new Camera/Cable/Monitor to test IF they still have the same parts available. The Camera pigtail can be up to 3 feet long. You GENTLY slowly pull it out of the hole in the back, until you reach the quick connect. Some cables get stuck on rear caps inside so you have to be gentle. You then connect the Camera to the Monitor. USUALLY, on an older system it is the Camera that is bad. What you need to do is go to RVCams.com and see if they have parts or replacement systems for your old system. I doubt Winne would have a part or system for a 13 year old motorhome. Doug