RGB Module Connections & Controls
The NV_RGB_X Video Interface is capable of both single video and dual video modes of operation. For dual video mode, the optional remote control pad is recommended for switching between the video inputs on the module.
Installation With Plug And Play Factory Harness
If your RGB unit came with an OEM fit factory harness, simply find the GPS navigation computer (either in the trunk, under a seat, or behind the LCD head unit) and remove the existing factory connector attached to it. Plug the new RGB wiring harness in, then connect the vehicle connector to the other end of the new RGB wiring harness. Each vehicle manufacturer varies, but in general here are the locations we recommend for each respective manufacturer:
Audi – Behind The LCD Screen Radio Head Unit
BMW – GPS Navigation Computer In The Trunk Or Under The Seat
Ford / Lincoln – Behind The LCD Screen Radio Head Unit
GM / Cadillac / Hummer – Behind The LCD Screen Radio Head Unit / Ribbon Cable Connected Inside Radio
Honda / Acura – GPS Navigation Computer In The Trunk Or Under The Seat
Mercedes Command 2.0 – Behind The LCD Screen Radio Head Unit
Mercedes Command 2.5 – Behind The LCD Screen Radio Head Unit
Nissan / Infiniti – Behind The LCD Screen Radio Head Unit
Subaru – GPS Navigation Computer In The Trunk Or Under The Seat
Toyota / Lexus – GPS Navigation Computer In The Trunk Or Under The Seat
Universal – GPS Navigation Computer In The Trunk Or Under The Seat
Volkswagen – Behind The LCD Screen Radio Head Unit
Volvo – GPS Navigation Computer In The Trunk Or Under The Seat
To install the RGB unit using the universal wiring harness you need to locate the Red,Green,Blue and Sync wires on the vehicles factory connector and “splice in” to these wires. After cutting these wires, you will put the RGB universal wiring harness in-line of the signal, by connecting one end of the cut wire coming from your GPS navigation computer to the respective IN wire on the RGB harness, then connect the OUT wire on the RGB harness to the cut wire going to your LCD screen. There will be a total of four wires you will need to do this to.

source: http://www.navvideo.com/downloads/Install_NV_RGB.pdf

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