Hello Everyone, I swapped my stock radio out for a double din head unit, then changed it out for an Android double din PX5 unit. The PX5 unit allows input for the backup camera and a reverse trigger to automatically switch on the back up camera. Doing research there is a 12V signal on the back of the MFD its M13 connector pin 21. It has a pink wire on my 2009 unit. When reverse is selected it goes to 12V otherwise it's at 0V. Had to enable the backup camera in the PX5 unit hardware systems settings not in ANDROID. The camera I'm using is a $15 camera that bolts to the license plate holder picked up on amazon. Ran the video wire along the drivers side, tapped the backup light on the drivers side for camera power. Hope this helps others.
170° CMOS Waterproof Night Vision Car Rear View Reverse Backup Parking Camera HD on eBay for $5 also got one on Amazon for $15 both mount to license plate.
