[wileetundra]

I had answered Heatwave3's questions via email but here are the answers for anyone that might be wondering...

His switch type and location is a great idea, I have seen others use the same location. I specifically like the orientation of the switch to remind you which mode it is in (enabling the functions for the passenger vs. normal driving mode).

The red wire on the 5-pin NAV plug is only in the CrewMax and other vehicles which have the rear seat entertainment option. It is a parking brake signal which tells the NAV when the brake is on, which is one of the factors that controls whether or not you can see DVD video on the front screen while in motion. This wire is not used for the SPG install.

I don’t have a rear seat entertainment system so I can’t say for sure, but I believe that the SPG will not enable DVD video on the front screen while in motion. The SPG sends a pulse which fluctuates between 0 and 1 kmph. I think even 1 kmph is enough to make the front video shut off, so the video will probably display for a short bit (2-4 seconds) when the SPG is enabled and in the 0 kmph phase of the pulse, but then the video will flicker off briefly with each 1 kmph portion of the pulse. Also, something sounds wrong in Heatwave3's testing since it normally takes more than a 0 speed pulse to show DVD video on the front. You also have to set the parking brake in most vehicles, so many people bypass the parking brake by hacking the red wire with a switch or permanently grounding the NAV portion of the red wire. If his video does come on and doesn’t flicker when the SPG is enabled and he is in motion then I would be curious to see if he has any other mods installed, particularly if he tampered with the red wire. Make sure to test the SPG in bypass mode for more than 30-45 seconds to be sure it is working. If you totally disconnect the SPG and factory speed wire your functions will be unlocked for up to 30 seconds before the NAV unit realizes no pulse is present and switches to the GPS signal for motion detection and locks the functions back again. This has happened to a few people that hooked it up wrong, and if so then your video might display briefly on the front, but normally you would also have to hack the brake wire.