I will pull my trailer with the lights
on, and only with the lights
on...day or night.
I put on my head lights
and running lights every time I put the truck in gear.
I wired the camera with the correct polarity to the center running light
in the back of the trailer. This wire was under the floor of the rear cupboard (the Foot has a 1" space built into all the cupboard floors). I mounted the camera to the underside of the same cupboard. Now when the lights go on the camera goes on and the screen on the visor in the truck lights up with a color video of what's behind me. Works great. The camera was $39.00 and the monitor was $69.00.