Pick up power for reverse?

I am installing an aftermarket backup camera for my 2004 Prius. What wire could I tap into for power while the car is in reverse? I've also seen references to people powering the camera to come on with a turn signal activation to see behind you when changing lanes, but I'm not sure if I want to do that. Rather than dig around in the back to test which wire I should use, I'm hoping someone else has blazed that trail and can help me out.

 

I doesn't say to get it from the reverse, just find a wire that provides power. Although now that you say that, it makes perfect sense. Thanks!

 

It's a wired install. I could have gotten wireless, but I'd rather not take up a Bluetooth connection with that.

 

Sorry to hear that, although I'm glad my instincts were correct. With something permanent installed, I didn't see the point of relying on wireless connectivity for the camera, especially when bluetooth has a hard enough time maintaining a connection just for audio.

 

I pulled the rear trim panels and don't see any wires that don't have corresponding connectors back there. Are you sure the harness is already there for every Prius? I'd love to use the existing wiring rather than pulling everything apart to run the video cable to the front of the car. I'll take some pictures tonight when I get home, or would appreciate a photo showing what wire(s) to look for.