The solution is very simple, i have posted it before with a diagram i believe.
Forget about holding the nav button or anything else, let the radio do it for you.
You simply need a single pole double throw switch, (spdt) and some wiring.
The switch looks like this
The style is up to you as long as its a SPDT switch, just because it has three prongs doesnt make it an SPDT. Some have a power, switched power and ground and are a simple on off switch not SPDT, and some SPDT switches have four/five prongs, the typical three and a ground and + for a light.... either way just make sure its the right kind.
This is the pole diagram for a simple three prong.
Heres how we hook it up.
Ground the cam.
You must run the + wire of the camera all the way into the cab as well as the CAM wire from the headunit where your switch will be.
Your camera + and reverse sense wire from the headunit will be tied together at COM on the switch.
pole will go to the reverse wire on the fusebox.
pole will go to a FUSED + hot wire.
Operation is very simple. Leave the switch in A position, the cam and radio will work normally when truck is put into reverse.
Flip the switch down to B position and the cam and headunit receive power going into the reverse mode automatically without you doing a thing except flipping the switch. Whallla demand reverse cam and video.
Flip it back to the A position and it goes back into auto reverse mode.
Make sure the settings on the HU are on auto for the reverse cam and enjoy.
Pole A and B are interchangeable, doesnt matter what goes were as long as the HU wire and cam wire are going to the COM port.
Originally Posted by orlandof150fan
you should have a purple wire on the back of your radio that will go to your reverse wire, so when you put it in reverse the radio will auto switch to camera input. you should be able to hold down your nav button for a few seconds and your radio should display your camera while driving also make sure your green wire on the back of the radio is grounded. the reverse wire for your 05 f150 is in the drivers kick panel and it is a black with pink located in a gray plug pin #13
This is true but it only works if your camera is wired HOT at all times, (not a good idea) otherwise (for you guys that have the cam tapped into the reverse lamp wires out back) you get a blank black screen cause the camera isnt ON.
Look thru the settings, there should be a reverse camera setting, set it to auto and the cam should appear when you shift to reverse.