I found a distributor of Gentex products so Im going to install the factory monitor mirror / 3rd brake light camera. In looking at our Expy the mirror has a wire plugged into the back of it. Im assuming this wire is for the auto headlights??? I know the Gentex monitor mirror also has a wire that plugs into it. However there is also a plastic box about 2"x2" and 3/4" thick behind the mirror. At first I thought this box was for the satelite radio but there is an antenna for that on the roof. Does anyone know what this plastic box is for?
I didn't realize that. The Gentex distributor has one that replaces your 3rd brake light. The mirror/ monitor comes with a 6 ft cable that runs down the pilar to under the dash and a 20ft cable the runs back to the camera. Gentex is the company that is contracted with ford for their factory system.
I found this site that carries Gentex equipment, there are other site out there though. They have the mirror/monitor like the one that comes from the factory. This mirror has a 2.4" display for the monitor. I believe there is a bigger one available, I think it has a 3.5" monitor. They also carry the 3rd brake light with the camera built in (apparently the factory system is over your license plate, next to the light.) The mirror comes with a 6ft wire that runs down under your dash and a 20ft wire the you would have to snake through your head liner to the back of the truck.