Vt Rv wrote:
Are they only on while backing or can they be on all the time to keep track of what your trailer is doing behind you.
This may depend on the make and model but.. on most models I believe the answer is "BOTH"
By default they will turn on, input "A" when you put the Motor Home in Reverse.
However on mine there is a column of buttons (on some it is a row) and the top one is marked with the universal symbol for power (Look at the power button on your computer) This one will turn it on until one of two things happens: 1: Turn off ignition or 2: Push it again.
The next one is marked A/B on mine.. This one selects a 2nd camera I installed... This rig is a Gasser, it's like 20-25 feet from where I sit to the gas cap, Lining up on a fuel hose is not all that easy when you are using the other side of the RV rear view mirror.
So I put a camera under the fuel filler... (This is a "Bolt" style camera, looks like a hotel door peephole from the outside, mounts in the wall with a single nut (as though it were a bolt) leads come out the inside end) When the pump is centered on the Screen.. Good to fuel.
Putting in REVERSE will switch back to the "A" input though till I fo foreward again.. Then it switches back to whatever I have selected (Remains on A or switches to B) Very useful.