rydebynite wrote:to have it running power all the time should be a constant power correct? If u just do it to the accessory wire (reverse light wire harness from the bulb) it will only come on when the car is put into reverse~!?~!?
Well on my Pioneer head unit when it detects 12V on the reverse wire, it automatically goes to the rear view camera, and you can't do anything on the head unit until you take the vehicle out of reverse. If you fed it constant 12V then it would think the car was always in reverse and the unit would stay permanently on the reverse camera screen.
Here's the bad news: The only option would be to hook up a switch (which will be connected to a constant 12V source) and then flip the switch when you want the rear view screen to show. THis would then allow you to turn on your rear view camera whenever you wanted without having the vehicle in reverse. However, you would also have to flip this switch whenever you go to back up, because you can't hook the switch and the reverse wire up to the same wire, because whenever you flip the switch, your reverse lights would go on. So you don't want to be driving and then flip the switch to see behind you and then freak out the person behind you because your reverse lights turn on.