lavarock1210 said:I use one of these to turn on by rear view camera.
https://www.amazon.com/Docooler-Voltage-Detection-Charging-Discharge/dp/B01GJM04GC/ref=sr_1_fkmr0_1?ie=UTF8&qid=1505053846&sr=8-1-fkmr0&keywords=Docooler+DC+12V+Voltage+Detection+Charging+Discharge+Monitor+Test+Relay+Switch+Control+Board+Module
I set the turn on voltage at 13.6 volts and the turn off at 13.0 volts.
That way the only time the camera is on is when the truck engine is running.
I installed this 6 months ago and so far it has worked perfectly with my wired system.
butch50 said:At first I thought this was a good idea for me also but then started thinking, I keep my RV plugged in any time it is not being used at my house. Duh that would mean for me that my camera would be on all the time. Sound like a real good thing for someone that doesn't plug their camper in all the time. Great Idea.