i have 2007 honda civic ex coupe. Currently have my power drawn for my backup camera at the driver side reverse taillight. but on my x3800bhs unit i have a feature to view rear camera without engaging in reverse. so i figured for that to work my backup camera should always be powered on. So where would be a good place to splice my power red wire from the camera into? I was thinking the parking light but i would have to turn on my lights for the camera to turn on too.

I usually go to the back of the head unit red accessories wire. Works great for me. But you still want to leave the reverse/ purple wire hooked up to your taillight so that the rearview mode still works. Hope this helps....