Need help finding reverse wire
 

I have added a back up camera to my stereo andthere is a reverse wire on the stereo that onnects to the car to tell the stereo to turn the camera on. I could connect to the + at theback up lights,but I amtrying not to run another wire to the rear of the car. Can someone tell me where that wire might be under the dash.

Thanks

RE: Need help finding reverse wire
 

That might be the best way. The car uses the PNP switch under the hood to turn the reverse lights on.