Hello MK1322 and welcome to the Country Coach Owners Forum and to iRV2.com. We are glad to have you join us here and we look forward to reading of your adventures and experiences. I am sure you will enjoy the website and forums. Stay safe and keep us posted. You may want to build a signature, with your coach year, make and model through your user profile by clicking on the " User CP" button near the left top corner of the page.
The hardest part of the job is running the cable but it is not the worst job to do. Hood some temporary power to the new monitor, connect the rear camera and make sure the system is working properly before running new cable (just in case the cable is defective). You may even be able to use the old cable from the camera to help drop down the new cable . I always start at the rear camera and work my way forward. Be sure to get some 3/8" wire loom to put the cable in for protection. Keep in mind the suspension and hot areas. Try to stay with other wiring looms and you should be good. When you get to the front there are also other looms that come thru the floor or firewall. Look to see what is your best option. You will have plenty of cable so don't be worried about running short. Loop up the excess and tape up or tie wrap out of the way. Good luck and let us know how it comes out. You may even want to take pics of the process and post with your process of "How to Do".
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7